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Guide:King Slime strategies

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King Slime
King Slime.pngOld-gen Console, Mobile, 3DS versions
AI TypeKing Slime AI
Damage40 / 64
Max Life2000 / 2800
KB Resist100%
Immune toPoisonedConfusedVenom
Coins 1 Gold Coin
Map Icon King Slime.png
Map Icon

King Slime Trophy.png "The lord of all things slimy." King Slime Trophy.png

The King Slime is an optional Pre-Hardmode boss.

Spawn Condition[edit | edit source]

King Slime can be spawned by fulfilling any of these conditions:

  • Naturally on Grass beyond the Dungeon and Jungle (this is approximate: it might be farther or nearer depending on world size);
  • Naturally by Natural-occuring Slime Rain;
  • Using Slime CrownSlime Crown.

It must then be defeated before all the involved players die.

Battle[edit | edit source]

King Slime is no different than a normal Slime: it moves by hopping to the player. Unlike slimes however, it has a large pool of health due to its status of boss, and it's huge. This makes King Slime an easy target, but don't let that deceive you: its jumps are very far and unpredictable (it's height also vary, depending on the distance between him and the player), and failing to predict it's jump destination can make you get damaged.

Getting too far to King Slime will make him teleport to you, meaning that you can't escape by just running out of screen. You can use it to your advantage however, as it can get stuck in enclosed spaces.

As King Slime gets damaged, it gets smaller. While this makes him harder to get hit, it also makes him more mobile, having less issues to escape small enclosures (should it fail however it might teleport instead), and it spawns lesser Blue SlimeBlue Slime to harass you. These can make you waste ammo on them instead of the King Slime, so the use of piercing weapons or ammo is important.

Killing King Slime only makes your life in Pre-Hardmode easier: its drop can greatly help you move around, but doesn't help you progress in the game. It makes the Slime Rain to stop however.

Old-gen console version Old-gen console, Mobile version Mobile, and 3DS version3DS[edit | edit source]

The main difference between these versions with Desktop version Desktop and Console version Console is that it doesn't teleport: it can get eternally stuck in small enclosures if it spawns there, but it's mostly the same.

Expert Mode[edit | edit source]

There are not many changes about the King Slime itself besides its higher Damage and Health. However, when damaged it will spawn Spiked SlimesSpiked SlimesDesktop VersionConsole Version in addition to regular Blue Slimes. Those can throw volleys of spikes at a short distance, so having a weapon which can pierce multiple targets and attack from a range will be necessary to avoid being bombarded to death.

General Strategies[edit | edit source]

General Tips[edit | edit source]

  • Starting the battle as soon as the sun sets (at 7:30 p.m.) will provide the maximum amount of time to defeat nocturnal bosses.
  • Prepare your Boss-fighting arena with adequate lighting, CampfiresCampfires and Heart LanternsHeart Lanterns for health regeneration, and Stars in BottlesStars in Bottles for mana regeneration if you use magic.
  • Desktop VersionConsole Version SunflowersSunflowers provide the Happy! buff to players within a 50-tile radius, which grants a +10% movement speed bonus and 17% reduction in enemy spawn rate.
  • Always bring with you at least one stack of LesserLesser, NormalNormal, GreaterGreater or Super Healing PotionsSuper Healing PotionsDesktop VersionConsole Version before doing anything: relying only on natural Health Regeneration is not a good idea.
  • It is suggested to build houses for the DryadDryad and the NurseNurse NPCs in your arena. The former casts the Dryad's BlessingDryad's BlessingDesktop VersionConsole Version buff, which increases your defense and provides you with a thorns-like effect, while the latter can heal and remove debuffs instantly, at the cost of some coinscoins.
  • Bosses are displayed on the Minimap: Follow the boss's icon to track it when you're struggling to find it. You can identify the boss icons by checking their respective wiki pages.
  • Once you have freed the MechanicMechanic in the Dungeon, you can use WireWire to enhance your arena with TrapsTraps and helpful HeartHeart and Star StatuesStar Statues. The former help to damage the enemies, though be careful to set them up correctly in order not to hurt yourself during the battle. The latter will spawn heart and star pickups, respectively. Connect these devices to timerstimers.
  • It may be useful to summon and kill the Eye of Cthulhu before summoning any harder boss in order to spawn an extra one-use pool of hearts.
  • Remember to use the Sharpening StationSharpening StationDesktop VersionConsole Version, Ammo BoxAmmo BoxDesktop VersionConsole VersionOld-gen console versionMobile Version, Crystal BallCrystal Ball and Bewitching TableBewitching TableDesktop VersionConsole Version before you go to explore or battle Bosses / Invasions. These will give class-specific boosts that are useful to take. They respectively give SharpenedSharpenedDesktop VersionConsole Version, Ammo BoxAmmo BoxDesktop VersionConsole VersionOld-gen console versionMobile Version, ClairvoyanceClairvoyance and BewitchedBewitchedDesktop VersionConsole Version.

Terrain Preparation[edit | edit source]

Due to the fact this boss can't pass through blocks, there are some arena options:

  • The player can add traps to this pit, which would make the fight even easier or:
  • A flat area with small room below it with Platforms as roof for the player. King Slime can't enter small rooms and thus can't touch the players in this room.
  • An arena made up of platforms and Ropes for both horizontal and vertical movement would help.
  • Make a small 2*4 pit cover the top with wooden platforms and shoot upwards.

Gearing Up[edit | edit source]

Armor[edit | edit source]

Armor is not very important in this fight. However, it is recommended to have at least Cactus Armor, as it is very easy to obtain and provides a relatively good amount of defense.

Weapons[edit | edit source]

Most weapons can be used to fight this boss without difficulties, except Shortswords. Piercing weapons may be preferred, to hit both the blue slimes and the king slime himself.

However, melee users may have trouble fighting the boss due to the knockback immunity, unlike ranged users which can stay in an unreachable place without getting hit. Recommendations:

  • Gold/Platinum Broadsword or better.
  • Any Bow with piercing arrows such as Unholy Arrow or Jester's Arrow.
  • Any kind of Guns, Spears, or Flails.
  • Vilethorn, this weapon hits through blocks and pierces infinitely until the duration ends and therefore very good for fighting King Slime.
  • Crimson Rod, if using a small enough pit, the king slime will stay in one spot and this weapon can do a lot of damage.
  • Any weapon that can go in one direction, such as a Gem Staff.
  • Using Grenades can deal a lot of damage to the King Slime. The only issue would be dodging your own grenades, as they can deal damage to you as well even if you're the one who threw it.

Accessories[edit | edit source]

Like weapons, most accessories can help:

Potions[edit | edit source]

Specific Strategies[edit | edit source]

No teleports Strategy[edit | edit source]

  • Build a one-block thick wall 18-20 blocks high;
  • Create a walkway between 35-50 blocks long with platforms for maneuverability;
  • Make sure a CampfireCampfire is nearby.
  • Use any long-range weapons (Yo-yos, Bows, Gemstaves or Throwing weapons).

Rope Strategy[edit | edit source]

An easy way to defeat King Slime is to do this:

  • Make a rope around 20-30 blocks high from the ground
  • Use any weapon that has range (bows, staves, shurikens, grenades etc.)
  • Climb up to the rope, and shoot King Slime.

This way, you are practically invincible from him, as he cannot jump to you, and there is no surface for him to teleport on. Be careful if doing this strategy during Slime Rain, since a slime can fall from the sky and knock you off the rope.

Lava pit Strategy[edit | edit source]

Because the King Slime can be harmed by Lava, a good strategy is to use a Lava BucketLava Bucket to make a long strip of land with a small amount of lava (shallow enough so items don't burn) and then make some widely placed platforms. You can jump, use rocket boots, or use a grappling hook to move between platforms. Just be careful to not jump in the lava if you don't plan to use Obsidian Skin PotionObsidian Skin Potion. This strategy works with his teleports, and the minions will all die from falling in the lava. You don't have to focus on fighting, because the lava will dish out major damage. You can also skip the platforms, and use a Obsidian Skin Potion, and just evade by running under the slime, or using the Boots to fly over.

Minecart Strategy[edit | edit source]

Another strategy is to make something that will help you later, a long Minecart rail path. If you go high enough, he will not be able to teleport or jump on you. His attacks relies for you to be on the ground. To the AI it seems that you are on the ground, so he just stands under you and occasionally jumps, making him an easy target.