Guide:Arena

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Information.svg Note: Most of the arena designs that are listed below have to be edited in their respective Terrain Preparation sections of their guide, as they are transcluded from these pages.

An Arena is generally an area that the player builds where they can face a Boss or other significant challenge more easily. Each arena can be different for each boss, some consisting of a flat area or multiple layers of Platforms supported with Statues.

General Arenas[edit | edit source]

  • An arena is better built away from Bases so NPCs won't get hurt or killed. It's better built near the ground, far from Space so there won't be any unwanted HarpyHarpy or WyvernWyvern spawns during an important fight.
  • A typical arena usually consists of multiple long rows of Wood PlatformWood Platforms, or a flat surface on the ground or the air made out of Asphalt BlockAsphalt Blocks to greatly increase running speed.
  • Sometimes, the shape of the arena depends on the Boss or Event and how the player decides to fight it. Dart TrapTraps and Lava BucketLava can be used to easily kill enemies from Events, while certain bosses like King Slime lack the ability to attack through solid blocks (although as of update 1.3.0.1, King Slime will teleport directly to the player if he gets stuck on blocks).
  • Placing CampfireCampfires, Heart LanternHeart Lanterns, Honey BucketHoney placed in BubbleBubblesDesktop, Console, and Mobile versions and Heart StatueHeart Statues will greatly increase Health regeneration in battle. A Mage may also want to place Star in a BottleStars in a Bottle and Star StatueStar Statues to regain Mana more easily.
  • Peace CandlePeace CandlesDesktop, Console, and Mobile versions reduce enemy spawn rate, which may help on bigger arenas - however, in many scenarios such as farming events, an increased spawn rate is more favorable.
  • Water Candles increase enemy spawn rate, which will help when fighting timed events such as the Pumpkin Moon - keep in mind, though, that fighting bosses or untimed events will be more difficult.
  • You can build a house for your NurseNurse NPC near your arena. The House should have a BedBed, so in the middle of the battle you can use a Magic MirrorMagic Mirror or Recall PotionRecall Potions to visit the Nurse and get instant healing. The house is better built away from the arena to prevent the Nurse from being killed.
  • A Bast StatueBast StatueDesktop and Mobile versions can be used to increase defense of nearby players. It is found in the underground desert.
  • Since luck increases damage, it's helpful to place luck increasing items like Garden GnomeGarden GnomeDesktop and Mobile versionss and the corresponding biome's Torches.
  • Once you have killed a Mechanical Boss and had the SteampunkerSteampunker move in, you can buy and use TeleporterTeleporters to devastating effect. When wired to a Gray Pressure PlatePressure Plate placed above them, you can instantly transport across the arena as soon as you walk on them, greatly increasing mobility. They could also, alternatively, be used to teleport to the Nurse, heal up, and quickly return to the arena.

Advanced Arenas[edit | edit source]

  • If using the Nurse is something that you are planning to do, create a three block high valid NPC house directly underneath your arena and move in the Nurse. This way, you can still right-click her easily since she is right underneath you and still run right by without having to enter a building that could trap you.
  • Try building your arena so the center is at your natural world spawn, that way if an event occurs you can easily teleport there by unsetting your spawn point from your bed and using a Magic Mirror or Recall Potion. You will teleport directly to the arena so you can get in the fight right away, and if you die you will respawn right there again. Try combining this with the above strategy so you can respawn after death right at the Nurse to heal yourself the rest of the way.
  • If you are going to be moving the Nurse into your arena, it is a good idea to move the Arms Dealer into a nearby or adjacent house so the Nurse will be happy. This way, healing from the Nurse will cost much less than if she was alone, and you can easily buy more ammunition from the Arms Dealer if you run out.

Bosses[edit | edit source]

King Slime[edit | edit source]

This content is transcluded from Guide:King Slime strategies.King Slime is one of the few bosses in the game that lack the ability to go through blocks. This can be exploited in multiple ways:

  • On Console version Console version, climbing on a RopeRope 35 blocks above the ground allows the player to attack him at range safely without him teleporting onto the player. Add extra rope to give the playerrself a margin of error, or to retreat and heal if need be. Using this method makes potions, higher damaging weapons, armor, and movement accessories optional, as the player will not need to dodge attacks or mitigate damage.
  • Make one or two platforms above the ground; King Slime will eventually teleport to ground level and the player can easily hit him from the platforms.
  • A flat area with small room below it with Platforms as roof for the player. King Slime can't enter small rooms and thus cannot reach the players in it.

It is possible to exploit the King Slime's large size in Old-gen console version Old-gen console and 3DS version3DS versions by making him stuck in-between blocks.

Eye of Cthulhu[edit | edit source]

This content is transcluded from Guide:Eye of Cthulhu strategies.

A basic arena made for the Eye of Cthulhu.

An arena for the Eye of Cthulhu should be large enough to dodge and maneuver around in. The recommended size is just about the size of the screen, as the boss does not require a lot of mobility.

The simplest arena design consists of multiple rows of wooden platforms to have more room to jump and dodge. As the fight will be at night, add torches to improve visibility. Remember to adjust the distance between platforms depending on your jump height (this is 6 tiles at minimum, depending on which accessories you have), and consider placing some ladders (with platforms or rope) to aid your vertical movement.

Another design is a long, completely flat surface. This allows you to dodge the Eye by running to the left or the right with Swiftness Potions or Hermes Boots.

Eater of Worlds[edit | edit source]

This content is transcluded from Guide:Eater of Worlds strategies.

Multiple platforms made for the Eater of Worlds fight.

The player must be in The Corruption to summon the Eater of Worlds; moving too far away from the biome during the battle will cause it to flee.

The Eater of Worlds is a very large Worm enemy, so dodging it may prove to be difficult. You may want to try fighting it on the surface instead of underground. If summoning this boss via breaking shadow orbs, be sure to provide yourself a quick and safe escape back to the surface where your arena will be. A room with a BedBed next to your arena can let you teleport there easily, but be careful that the path from orb to arena does not go through any non-Corrupted areas (lest the boss despawn). When making your arena on the surface, you have some options:

  • In Normal mode, make it fairly tall, thin, and easily climbable with many Platforms. That way, not only you can see it coming, but this will force it to climb in a relatively straight line, leaving large portions of its body exposed, and vulnerable to piercing attacks.
  • In Expert mode, due to the frequency of the Vile Spit attack, the Eater of Worlds will become much harder to dodge. You need to make an arena to compensate for this new attack. Build a regular row of platforms (your choice of length) in the sky. After this, build a long row of blocks (at least 50 blocks long) next to it. While you fight the boss, all of the Vile Spit projectiles will be blocked by this block barrier. If you built the arena low enough, the boss will be able to travel on your defense platform-- Watch out for this, but also utilize it to attack it when it's vulnerable.
  • Whichever option you choose, make sure the arena doesn't go too high. If it goes too high and the Corruption background disappears, the Eater of Worlds will start despawning.
  • It's also recommended to build your surface arena above a valley. While it's still above the ground, the hills on either side will provide higher ground for the Eater of Worlds to get to you and make your arena less effective.
  • To not get interrupted by Eater of Souls, it's recommended to place an Eater of Soul Banner to minimize their damage. You can obtain one by killing 50 Eater of Souls.

If you don't want to fight it on the surface, it's alright to fight it underground instead. If you are breaking Shadow OrbShadow Orbs, hollowing out an entire arena every third orb or escaping to a surface arena may not be practical; you should modify the terrain around you to have a quick path of escape to a space with good horizontal clearance and any hazardous terrain smoothed out or boarded over. Consider placing platforms periodically to provide extra maneuverability.

If you have an Autoswing weapon such as the Falcon BladeFalcon Blade or a KatanaKatanaDesktop, Console, Old-gen console, and Mobile versions, you can use a Grappling Hook and hook it to the ground to be able to remain stationary. Alternatively, a Cobalt ShieldCobalt Shield or an Obsidian ShieldObsidian Shield can be used to become immune to Knockback. If you happen to have any Shadow HelmetShadow armor, it could be useful, as it increases your melee speed. Once the Eater of Worlds has been summoned, begin swinging. As the Eater of Worlds tries to inflict damage by passing through you, the Autoswing weapon will destroy its sections fast and effectively, and the fight will be over fairly quickly. This can also be used as an effective farming technique.

Brain of Cthulhu[edit | edit source]

This content is transcluded from Guide:Brain of Cthulhu strategies.

Standard 5 layer arena.

Your arena will have to be built in The Crimson, because it can only be summoned there. Since the Brain of Cthulhu spawns as soon as you smash a third Crimson Heart, you're likely to be in a very enclosed area when the fight begins. This can lead to you to being swarmed by the Creepers and get overwhelmed. This can be avoided by preparing the chasm's main chamber as an arena beforehand, and choosing which Hearts to break first:

  • For the first two, pick the least convenient hearts (distant, above the main chamber, underwater, etc).
  • For the third, pick the closest to the main chamber, toss a Bomb or another explosive and quickly go to your arena while it falls.

If you have access to the Dryad, purchase several stacks of Purification Powder and completely convert the main chamber so that there is no Crimstone Block exposed to air, which prevents you from needing to deal with other Crimson-based enemies during the fight, although standard Underground enemies may spawn in their place. Set up several rows of platforms all the way across the central chamber, close enough that you can jump up to the next platform, and light up everything.

If summoned with a Bloody Spine, then the arena can simply be made in the Surface, however do not make it very tall, as jumping too far above it will be considered exiting the Crimson, causing the Brain of Cthulhu to despawn. If you have already prepared the central chamber as an arena for a prior fight, use the Bloody Spine there to avoid a despawn.

Queen Bee[edit | edit source]

This content is transcluded from Guide:Queen Bee strategies.Even if you summon the Queen Bee by breaking a Larva, you do not need to stay in the hive to fight it - you can get out of the hive and fight it in the wide-open areas of the Underground Jungle if you'd prefer. However, most Hives offer an easy arena: a decent amount of space is already carved out, and the pool of Honey at the bottom provides a health-regenerating buff which stacks with other buffs.

As with most bosses, Wooden Platforms are vital. Having them every 5 blocks is an optimal height but if your jump height is boosted in some way, you can increase the number of spaces between platforms which can save you materials.

Solid blocks can help to destroy the stingers.

Skeletron[edit | edit source]

This content is transcluded from Guide:Skeletron strategies.

The entrance to the Dungeon can be easily adapted into an arena.

Warning: Don't make significant edits to the dungeon floor. Doing so can stop the Endgame Cultists from spawning, potentially blocking progression. Plan your arena above the Dungeon roof instead.

The entrance area to most dungeons can often be modified into a more desirable arena if needed. Most important is that you have room to dodge the hands, as well as enough vertical space to avoid getting trapped when Skeletron's head begins to spin.

Wall of Flesh[edit | edit source]

This content is transcluded from Guide:Wall of Flesh strategies.The Wall of Flesh benefits from having an arena prepared more than other bosses.

The simplest arena is a long bridge of about 750-1000 blocks with some space above it for the player to maneuver. Placing the player out of danger from falling into lava and ensuring that they can keep a steady attacking pace allows the fight to be faster and easier. Players may also wish to place lights and make holes on the bridge to drain Lava from Lava SlimeLava Slimes or equip Royal GelRoyal GelDesktop, Console, and Mobile versions ; alternatively, Obsidian Platforms can be used, as they do not break when contacting lava, and the materials to make them can be obtained in bulk by demolishing the Ruined Houses.

However, one can skip the whole terrain preparation process by consuming Water Walking PotionWater Walking Potions or wearing Lava WadersLava Waders instead. In 1.4, the Terraspark BootsTerraspark BootsDesktop and Mobile versions may be preferable.

Note that Underworld map generation tends to place Ruined Houses towards the middle third of the map, leaving the eastern and western wings mostly clean.

The Wall of Flesh begins its attack from whichever side of the Underworld's map edge you're closest to. This allows you to control its direction of approach. Fight in the direction you're most comfortable with.

Killing the Wall of Flesh will generate a bricked-in treasure box above your bridge. The bricks can serve as kill-markers, but they may interfere with movement if your next fight runs close to that spot.

Alternatively, you can build the arena with Minecart TrackMinecart Tracks, since you can keep a safe distance with a MinecartMinecart with decent speed. However, keep in mind that jump mobility is more limited when using Minecarts.

While tedious, risky, and generally not worth it, you could use the Superheated BloodSuperheated BloodDesktop and Mobile versions Mount to collect all the nearby lava. However, it does require a lot of mining and setting up. And it is generally much easier to just use accessories, potions and other items that provide invulnerability against lava and/or fire.

On the 05162020 seed, due to the large lava lake making up the middle of the Underworld, Water Walking PotionWater Walking Potions, Lava WadersLava Waders, or the Superheated BloodSuperheated BloodDesktop and Mobile versions Mount can be used to bypass terrain preparation.

The Destroyer[edit | edit source]

Using a Daedalus Stormbow with holy arrows can be extremely effective due to the destroyer's length making it easy to hit

This content is transcluded from Guide:The Destroyer strategies.

The Twins[edit | edit source]

This content is transcluded from Guide:The Twins strategies.The Sky above the surface is highly recommended for the Twins arena, as vertical movement is required to dodge most of the attacks.

  • A very long Sky Bridge (if possible made out of Asphalt BlockAsphalt or Frozen Slime BlockFrozen Slime Blocks) is optimal. Continuously running with Spectre BootsSpectre / Lightning BootsLightning / Frostspark BootsFrostspark / Terraspark BootsTerraspark BootsDesktop and Mobile versions causes both to miss you with their projectiles very often, and keeps each Twin at a stationary horizontal position most of the time, allowing you to fire continuously at it without switching your aim. Wings will help dodge each of the Twins' second phases. Using Asphalt can negate the need for Boots, while using them can allow you to avoid taking damage completely. However, try not to run too fast if you use Boots and Asphalt, as Retinazer may fall behind and despawn. Spazmatism, however, is fast enough to keep up. Regular stone blocks can be used too if you have obtained the Blessed AppleBlessed AppleDesktop, Console, and Mobile versions.
  • The standard Boss arena of several layers of Platforms may be of use, as it allows firing and maneuvering in any direction. A solid ceiling just above your top platform will block Retinazer's beam attacks, as Retinazer always flanks from above.
    • Also, a wall on both sides of a small area can block Spazmatism's cursed fire, but be careful not to run out of time from covering behind the wall. It is helpful to have a one block hole one block up to shoot through. This is more useful if you want to try tanking the boss with the above tip of heart statues. If you can tank the hits with the help of heart statues, you can gun down Retinazer while Spazmatism is only able to charge at you.
  • A safety box in the ground isn't bad either, if you acquired the Daedalus StormbowDaedalus StormbowDesktop, Console, and Mobile versions. That way you could attack Retinazer while its laser can't hurt you in the box. In order to attack Spazmatism make the box one block from the surface and bring Holy ArrowHoly Arrows, the impact from the stars could hurt it. Stay close to the edge so the Cursed flames can't hurt you.

Skeletron Prime[edit | edit source]

This content is transcluded from Guide:Skeletron Prime strategies.

Plantera[edit | edit source]

This content is transcluded from Guide:Plantera strategies.

Golem[edit | edit source]

This content is transcluded from Guide:Golem strategies.

  • Create a small wall dividing the entrance and the arena, leaving an opening for your projectiles to get through. This becomes difficult to build if your default layout has the entrance in the ceiling.
  • Create a much larger wall that divides the arena on either side of the altar leaving an opening at the top for you to leap through post-spawn and a spot for your weapons.
  • An assortment of small walls scattered throughout the arena.
  • A small pit that you can leap into while Golem stomps and punches. This will allow you to deal heavy damage, but you have to be cautious about his eye lasers and fireballs. A heart statue in the pit with you can be useful in keeping you alive.
  • TeleporterTeleporters can be used for dodging the attacks and move safely and instantly from side to side.
  • If you decided to fight Golem in the temple, then Lihzahrd BannerLihzahrd and Flying Snake BannerFlying Snake Banners would be useful because they will still keep spawning during the fight. It'll be much easier to get rid of them.

For safety reasons, you should use a Pickaxe or Wire Cutter and remove/disarm all of the traps, as these can be hazardous in the fight.

Duke Fishron[edit | edit source]

This content is transcluded from Guide:Duke Fishron strategies.

Lunatic Cultist[edit | edit source]

This content is transcluded from Guide:Lunatic Cultist strategies.A basic arena with some rows of platforms will suffice. If the player made an arena for Skeletron, they can reuse it here.

Moon Lord[edit | edit source]

This content is transcluded from Guide:Moon Lord strategies.If one is having problems fighting the Moon Lord, a skybridge can be built to make the fight significantly easier. Ideally, it should extend quite far from either side of your spawn point (700-1000 platform blocks should suffice). The Moon Lord will not despawn unless all players are dead, meaning you can outrun him and heal for a while if need be. However, straying too far will cause the Moon Lord to teleport on top of you, so careful spacing is required. This is of less concern in multiplayer, as the Moon Lord will only chase one player at a time, giving the others time to retreat and heal up if necessary. A long straight Minecart Track paired with the Mechanical Minecart will help you avoid most of his attacks. Make sure to hammer the ends for bumpers or make a loop to return to the straight track.

Console Version A simple roof made of solid blocks is useful for blocking the Phantasmal Deathray. Thickening the roof will also mitigate the explosions of the Phantasmal Eyes. You can open up holes in the roof to shoot through when the Deathray isn't active, or you can leave the roof without any holes and damage the Moon Lord exclusively with weapons that can phase through walls. Desktop and Mobile versions In 1.4, the Phantasmal Deathray will pass through blocks and damage the player below, vastly reducing the effectiveness of this strategy.

Asphalt can still be used to dodge the tongue if you value the ability to use Vampire Knives. When the Moon Lord teleports with his tongue already chasing you, the tip of the tongue will not teleport with him. This allows you to completely outrun the tongue, avoiding Moon Bite and allowing Vampire Knives/Spectre armor to work normally.

Dungeon Guardian[edit | edit source]

This content is transcluded from Guide:Dungeon Guardian strategies.You need to be in a world where Skeletron has NOT been defeated. Otherwise, it will not spawn.

As it will instantly kill you when it touches you, the only way to defeat it is to outrun it. Therefore you have five good options for terrain:

  • The first option is simply use the whole map, by using Gravitation Potions to move around. You will fall faster than it and you can move diagonally to go even faster.
  • The second option is a very long Skybridge. You will be equally fast as the Dungeon Guardian when running horizontally and jumping with wings. If you want to outrun it make a diagonal skybridge or build the skybridge out of Asphalt.
  • The third option is to simply use a good pair of Wings or a flying mount such as the Cosmic Car Key or Shrimpy Truffle with a clear, open space.
  • The fourth option requires a rail system that goes in a circle, using a fast Minecart (Using mechanical Minecart is more useful) or Booster Tracks. This can also be automated with Traps, such as Spike Ball or Spear Traps within the rail circle of with summons and a Star Wrath.
  • The fifth option is to set up a Hoik loop. As the Dungeon Guardian spawns use a recall potion to get to a spawn point set up near the Hoik loop and mount it. If timed correctly, you will loop around fast enough to make the Dungeon Guardian constantly change direction, and, as a result, simply spin in tight circles in the center of the Hoik loop.

To reliably "summon" the Dungeon Guardian, it is recommended to dig a straight shaft down from outside the dungeon. The Depth Meter or any of its upgrades are recommended for this.

If the player has access to the Mechanic and Steampunker it is possible to build a Teleporter arena (example). This can make the fight dramatically easier, especially if the Teleporters are automated with Timers. As the Mechanic is found in the Dungeon it is required for the player to bring materials from a world where Skeletron has already been defeated.

Invasions[edit | edit source]

General Invasions[edit | edit source]

Invasion events such as the Goblin Army, Pirate Invasion and Martian Madness can only be fought near the Spawn, or somewhere close to an NPC.

Before starting an event, make sure NPCs are protected, otherwise they will be attacked and possibly killed during the fight. Placing a block in front of a Door will prevent enemies from forcing them open and killing the NPCs.

If defended properly, the events can then be easily fought on a player's Base, using the Houses built as cover. Since most enemies from invasions lack the ability to attack through walls, they can be easily killed while standing above them in an enclosed room. However, make sure to have an exit ready for when the enemies that can attack through blocks spawn.

Old One's Army[edit | edit source]

This content is transcluded from Guide:Old One's Army strategies.

An example of an Old One's Army arena.

Before facing the event, making a completely flat arena works very well. If an enemy's path to the Eternia Crystal is blocked, it will phase through obstacles, so trying to stop their progress with blocks won't be very effective. Building the floor with Asphalt BlockAsphalt Blocks will greatly increase movement speed. Using Potions is always a good idea, while it is also good to place CampfireCampfires, Heart LanternHeart Lanterns, Honey BucketHoney and Heart StatueHeart Statues to survive for longer. When fighting Tier 2 and 3, building a ceiling above the Eternia Crystal will protect it from Kobold Gliders, since they explode on contact with blocks.

Build a raised platform 20 blocks off the ground, halfway between the Eternia Crystal and the expected portal location. Placing Flameburst Towers on these platforms will allow them to target flying enemies more easily, which can reduce swarming of the Crystal in later waves.

Moon Events[edit | edit source]

Extensive arena for the Moon Events, making heavy use of platforms, Asphalt and passive healing tiles.
Example of an arena, making heavy use of Traps. Note that on higher difficulties, Traps are hardly useful.

The Pumpkin and Frost Moons are much easier to handle with the proper arena.

A flat surface about 168 blocks wide (See NPC spawning) will focus all spawns on the arena. Above it there should be a long platform of the same width, high above the ground in order to keep grounded enemies out of reach.

Since the player will mostly focus on the Bosses on the later waves, Lava pit and Traps may be helpful to take out the weaker enemies more easily. However, on higher difficulties the Traps' low damage is practically useless against the higher-health enemies, making them almost a liability due to their piercing iframes and the risk of being hit by them and taking massive damage in the process.

It's also a good idea to make a room with a BedBed near the Arena, so in case of death you can quickly get back to it.