Eye of Cthulhu

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Eye of CthulhuPhase 1
Eye of Cthulhu.png
Statistics
TypeBoss
DamageContact:
This attack will cause defense damage on hit. 15 / 30 Expert Mode / 40 Revengeance Mode / 60 Death Mode / 45 Master Mode / 51 Revengeance Mode Master Mode
Max Life3050 / 3965 Expert Mode / 4758 Revengeance Mode / 5055 Master Mode / 6066 Revengeance Mode Master Mode
Defense12
KB Resist100%
Immune toConfused
Eye of CthulhuPhase 2
Eye of Cthulhu (Phase 2).png
Statistics
TypeBoss
DamageContact:
This attack will cause defense damage on hit. 23 / 36 Expert Mode / 48 Revengeance Mode / 60 Death Mode / 54 Master Mode / 61 Revengeance Mode Master Mode (Phase 2)
This attack will cause defense damage on hit. 40 Expert Mode / 56 Revengeance Mode / 60 Death Mode / 60 Master Mode / 71 Revengeance Mode Master Mode (Phase 3)
Max Life1525 / 3050
2577 / 3965 Expert Mode
3568 / 4758 Revengeance Mode
3285 / 5055 Master Mode
4549 / 6066 Revengeance Mode Master Mode
Defense0
KB Resist100%
Immune toConfused
If you were looking for the Eye of Cthulhu on the vanilla wiki, click here.

The Eye of Cthulhu is a pre-Hardmode boss, fought anywhere during the Night.

While in Revengeance and Death Mode, the Eye of Cthulhu dashes more aggressively and more often as its health gets lower.

Spawn

The Eye of Cthulhu can be summoned manually using a Suspicious Looking Eye at night.

It also has a 1/3 (33.33%) chance of spawning automatically each night, if the following conditions apply:

  • The Eye of Cthulhu has not yet been defeated in the current world.
  • At least one player in the world has at least 200 maximum health and more than 10 defense.
  • At least four town NPCs are present.

If spawning this way, its arrival is announced by the status message "You feel an evil presence watching you...". Once this message plays, the Eye of Cthulhu will spawn after 81 seconds. If the player is sufficiently far underground, the Eye of Cthulhu will not spawn until they return to the Surface. If they remain underground all night, the boss will not spawn at all.

Behavior

In Revengeance Mode

The Eye of Cthulhu has two phases and 4 sub-phases during phase 2, it can fly through blocks in all of these.

Phase 1

It attempts to float directly above the player, while spawning 3–4 Servants of Cthulhu which drop Mana Stars on death. Afterward, it charges at the player three times in succession, before repeating the cycle.

Phase 2

Upon reaching 75% health, the Eye will transform into its second phase. When this happens, it will spawn 4-5 Servants of Cthulhu. In phase 2 its defense will drop to 0, but its contact damage will increase to 48. In this phase it will do 3 normal dashes towards the player with a small break between each set of 3.

Upon reaching 65% health, it gains a rapid chain dash attack. During this subphase it will do 3 normal dashes and then 2-4 rapid chain dashes with a short delay before it repeats.

Upon reaching 55% health, it will no longer do normal dashes and instead does 5 rapid chain ones.

Upon reaching 40% health, it gains another new attack, a long horizontal dash which spawns many Servants of Cthulhu. During this phase it will do 4-6 rapid dashes and then a horizontal one.

In Death Mode

  • Dashes faster and more often as its health decreases but also performs fewer chain dashes.

In the Boss Rush

  • Max health increased to 450,000 / 585,000 Expert Mode / 731,250 Revengeance Mode
  • Sets the time to 7:30pm

Summons

Servant of Cthulhu
Servant of Cthulhu.png
Statistics
TypeFlying Enemy
DamageContact:
12 / 24 Expert Mode / 30 Revengeance Mode / 34 Death Mode / 36 Master Mode / 42 Revengeance Mode Master Mode
Max Life8 / 12 Expert Mode / 15 Master Mode
Defense0
KB Resist0% / 10% Expert Mode / 20% Master Mode
Immune toConfused

Aftermath

Tips

For more elaborate strategies on defeating the Eye of Cthulhu, including weapon and arena recommendations, see Guide:Eye of Cthulhu strategies.