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Guide:Old One's Army strategies

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The Old One's Army event differs from others in that the invading enemies do not attempt to kill the player, instead they focus on destroying the Eternia Crystal used to summon it.

The invasion is separated into three Tiers depending on progression. It will start at Tier 1, and after a Mechanical Boss has been defeated Tier 2 can be fought. Then, after taking down Golem for the first time, Tier 3 is available.

The objective is to protect the Eternia Crystal from the enemies until all waves have been defeated.

Summoning Conditions[edit | edit source]

In order to summon the event, the Player must place the Eternia Crystal StandEternia Crystal Stand in a roughly flat terrain: a maximum of three tiles of vertical deviation is allowed, any more and the Stand will not accept the Eternia CrystalEternia Crystal.

The arena needs to be at least 61 tiles long on each side of the Eternia Crystal Stand, measured from the center of the Stand (a 123-tile clearing in total, with the Stand at the center tile). The enemy portals will spawn further away if given the space however, up to 120 tiles away from the center of the Stand on each side. The area also needs 10 tiles of clear vertical space.

General strategies[edit | edit source]

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 BlocksAsphalt Blocks will greatly increase movement speed. Using Potions is always a good idea, while it is also good to place CampfiresCampfires, Heart LanternsHeart Lanterns, HoneyHoney and Heart StatuesHeart 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.

Using one of the Tavernkeep's Sentries is also highly recommended, as they will greatly help when dealing with the many enemies the player will encounter. There are four different types with three tiers: Rod, Cane and Staff, with the latter being the strongest.

  • Lightning AurasLightning Auras are a circle of lightning centered on the base that damages enemies repeatedly as they walk through them. They have the lowest damage, but they also ignore enemies Defense, instead adding half of it to their total damage. When used while wearing Monk armorMonk armor or Shinobi Infiltrator armorShinobi Infiltrator armor, they will deal damage slightly faster and they will receive a 25% increased critical hit chance.

After the event is summoned, the player will obtain ten Etherian ManaEtherian Mana, enough to summon one Tavernkeep's Sentry. Two mysterious portals will also appear, and it's where the enemies will spawn. These enemies drop Etherian Mana when killed, allowing a player to summon more sentries as the event goes on.

It's easy to get overwhelmed when fighting the enemies coming from both sides, so the player should constantly move to the left and right of the Crystal in order to prevent the enemies from reaching it. They should also always be on the watch for Etherian Wyverns and Kobold Gliders, as they can quickly get to the Crystal and deal a lot of damage to it. The Tavernkeep's Sentries will deal with the weaker grounded enemies, however they are not very effective against flying enemies.

Tier 1[edit | edit source]

Dark MageT1
Dark Mage.png
Statistics
TypeBoss
EnvironmentOld One's Army
AI TypeDark Mage AI
Damage40 / 80
Max Life800 / 1600
Defense18
KB Resist100%
Immune toConfused
Map Icon Dark Mage.png
Map Icon

Tier 1 is the easiest, as it possesses the weakest enemies and lasts five waves. It can only be summoned after the Eater of Worlds/Brain of Cthulhu have been defeated, as then the Tavernkeep will spawn for the first time.

The player will see five different enemies:

  • The Etherian GoblinEtherian Goblin is the basic enemy of the event as well as the most common. It doesn't possess high stats or a special attack, making them very easy to kill.
  • The Etherian Goblin BomberEtherian Goblin Bomber and Etherian Javelin ThrowerEtherian Javelin Thrower are stronger enemies with ranged attacks. They will start spawning on Waves 2 and 3 respectively.
  • Etherian WyvernEtherian Wyvern is a highly damaging enemy with the ability to fly. It will quickly fly towards the Crystal, and then it will dive towards it. It will start spawning on Wave 4.
  • The Dark MageDark Mage is the Boss of the tier, spawning on Wave 5. It will alternate between shooting magical energy at the player, summoning Old One's SkeletonsOld One's Skeletons and healing all enemies around it. It needs to be killed in order to finish the event, but note that killing one of them does not instantly end the wave.

Recommended gear[edit | edit source]

While the event can be summoned at any time after defeating Eater of Worlds/Brain of Cthulhu, it's better to use the best gear available in PreHardmode.

Armor[edit | edit source]

Weapons[edit | edit source]

In addition to their normal weapons, all classes should also use one of the Tavernkeep's Sentries.

For Melee users
  • The Night's EdgeNight's Edge, Bee KeeperBee Keeper or the Dark LanceDark Lance are great weapons at close range.
  • If obtained, the ArkhalisArkhalis can do great damage to all enemies despite its short reach.
  • The CascadeCascade is a great weapon, but it's better suited for single targets.
  • The SunfurySunfury is great against crowds.
For Ranged users
For Magic users
For Summoners
For Throwing users

Accessories[edit | edit source]

Tier 2[edit | edit source]

OgreT2
Ogre.png
Statistics
TypeBoss
EnvironmentOld One's Army
AI TypeAttacker AI
Damage70 / 140
Max Life5000 / 10000
Defense34
KB Resist100%
Inflicts debuffOozedOozed
Debuff duration14 seconds
Debuff tooltipMovement is significantly reduced
Immune toConfused

After a Mechanical Boss has been defeated, the second tier can be fought.

The player will find five new enemies, and the four basic ones from the previous tier will get significantly higher stats, which is reflected on their different designs.

  • KoboldsKobolds are one of the new enemies found. When near the player or the Eternia Crystal, it will quickly dash towards them, exploding on contact. The explosion deals high splash damage.
    • In the later waves, the player will also find Kobold GlidersKobold Gliders, a variant with much lower stats but the ability to fly like Etherian Wyverns.
  • DrakinsDrakins have high health, defense, and knockback immunity, making them very hard to kill. They are very slow, however they will fire magical shots from a distance.
  • Wither BeastsWither Beasts will surround themselves with an aura of crystals which will inflict the Withered ArmorWithered Armor debuff, halving defense of players inside of it. They also possess high health, and they can regenerate damage taken.
  • The OgreOgre is the boss of the tier. It possesses very high damage and health, and does three dangerous attacks. From a long range, the Ogre will hurl a ball of snot at a target, it will only damage targets it hits but it will inflict the OozedOozed debuff on any nearby player, slowing them down significantly. It can also jump into the air and land with a shockwave, doing area damage about ten blocks forward in each direction on the ground. At very close range, it will strike with its club, dealing very high damage. Like the Dark Mage, it needs to be the last enemy killed in order to finish the event. When killed also drops an unique Accessory or Weapon.

Recommended gear[edit | edit source]

Armor[edit | edit source]

Weapons[edit | edit source]

Just like in Tier one, all classes should also use one of the Tavernkeep's Sentries with their normal weapons.

For Melee users
For Ranged users
For Magic users
For Summoners

Accessories[edit | edit source]

Tier 3[edit | edit source]

Betsy
Betsy.png
Statistics
TypeBoss
EnvironmentOld One's Army
AI TypeBetsy AI
Damage80 / 104 (melee)
65 (fireball)
120 (flame breath)
Max Life50000 / 75000
Defense38
KB Resist100%
Inflicts debuffOn Fire!On Fire!
(Breath attack) 100% chance

Debuff duration7-10 seconds / 14-20 seconds
Debuff tooltipSlowly losing life
Immune toConfused
Map Icon Betsy.png
Map Icon

After the Golem has been defeated, the third and final tier of the Old One's Army can be fought.

Like the previous tiers, enemies will get significantly higher stats, and some will also get new designs. There are also two new ones:

  • Etherian Lightning BugsEtherian Lightning Bugs will quickly fly near the Crystal, and attack it with energy projectiles. They will inflict Withered WeaponWithered Weapon on hit, which will temporarily halve the damage output of all weapons.
  • Betsy, who will spawn on Wave 7 serving as the final boss of the event. Unlike the other enemies, she will directly focus on killing the player instead of the Crystal. Her attacks consist of spinning in circles before charging multiple times, breathing fire, shooting fireballs and spawning Etherian Wyverns. While her attacks don't deal too much damage to the Crystal, the threat of the other enemies can make the final wave significantly harder than the others. Like with the Dark Mage and Ogre on Tiers 1 and 2, killing her will end the event.

Gearing Up[edit | edit source]

Armor[edit | edit source]

  • Beetle armorBeetle armor is the best choice for a Melee character. The Mail gives significant buffs to offensive stats, while the Shell adds a great amount of damage reduction.
  • Shroomite armorShroomite armor is the best for a Ranged user. Its set bonus is particularly useful since the player can beat the event by shooting the enemies while standing in the center.
  • Spectre armorSpectre armor is the best for a Mage. The Hood should only be used when healing is needed, since it will greatly reduce damage dealt.
  • Summoners should summon their minions and sentries while wearing Spooky armorSpooky armor, and then swap to Tiki armorTiki armor for an extra minion.

Weapons[edit | edit source]

For Melee users
For Ranged users
For Magic users
For Summoners
Accessories[edit | edit source]

It's recommended to reforge all accessories to Lucky or Menacing.