Eye of Cthulhu

The Eye of Cthulhu is a bigger version of the Demon Eye and is a boss enemy.

To summon it, you need a Demon Altar and 10 Lenses to craft a Suspicious Looking Eye. The player can use it to summon the Eye of Cthulhu. This boss is thought to be the easiest boss by the games developers.

An often used strategy and probably the best way to kill it is to buy a large number of shuriken from a merchant, despite the fact that it also takes alot more time. Buying 300 of them should be enough to kill it.

The Eye of Cthulhu will occasionally spawn naturally when you have killed 20+ Demon Eye, and is indicated by a status message to the player: "You feel a evil presence watching you..." and then "The Eye of Cuthulu has Awakened!" If the message occurs during daylight, the Eye of Cthulhu will not spawn until nightfall.

Using the Suspicious Looking Eye during the day will kill the player instantly. It will also run away if day breaks during the fight.

Phase 1
The Eye of Cthulhu can only be summoned at night and will disappear without dropping any loot if the player does not kill it before day.

Although not required, it's recommended to use a ranged weapon to kill it. Melee weapons damage it, but hitting the Eye of Cthulhu is very difficult, as it sometimes flies through walls and terrain, as well as the air.

The Eye of Cthulhu has 3000 HP in single player. In Multiplayer, the Eye of Cthulhu has more HP.

During Phase 1, the Eye of Cthulhu also periodically spawns Servants of Cthulhu.

Phase 2
Once the Eye reaches about 1500 HP, the second phase commences. This doubles the amount of damage it deals and changes the sprite so that it looks like a mouth (replacing the iris and pupil) with a set of large, sharp teeth. The Eye also takes slightly increased damage duing this phase.

In the 2nd phase, instead of spawning servants, the Eyes charge at the player 3 times, takes a short break and then repeats. It continues this pattern until death or daybreak.

Rewards

 * Gold
 * Crystal Heart (not always)
 * Demonite Ore (not always)
 * Unholy Arrows
 * Coins
 * Small Hearts
 * Corrupt Seeds