Eye of Cthulhu

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The Eye of Cthulhu has striking resemblance to the Demon Eye, and is a boss enemy. This boss is thought to be the easiest boss by the game developers. While playing, the player may get the message, "You feel an evil presence watching you...", which means that the Eye will awaken soon. After a few minutes the message "The Eye of Cthulhu has awoken!" will appear and the boss will promptly start to attack the player.

However, if "You feel an evil presence watching you..." and you aren't ready to fight the Eye of Cthulhu, you can opt out of fighting it by simply exiting and restarting the world. To summon the Eye of Cthulhu, you will need 6 Lenses and be standing near a Demon Altar to craft a Suspicious Looking Eye, which can later be consumed to summon the Eye of Cthulhu. The Eye of Cthulhu can only be summoned during night-time and will disappear without dropping any loot if the player does not kill it before daytime (4 a.m.).

The Eye of Cthulhu can randomly summon itself with a 33% chance each night if the following criteria are met:


 * Any player in the game world who has at least 200+ health.


 * There are at least four NPCs in the world. Note that the Old Man does count as one of these 4.


 * The Eye of Cthulhu has not already been defeated.



Attack Pattern
The Eye of Cthulhu will hover around the player and shoot out the Servant of Cthulhu every couple of seconds from the iris, then after four to six have been launched, it will dive towards the player three times and repeat this process until its HP reaches 1400 which begins phase 2.



Phase 2


Once the Eye of Cthulhu reaches 1400 HP or below, the second phase commences. This nearly doubles the amount of damage the Eye of Cthulhu deals and changes the sprite so that it looks like a mouth, replacing the iris and pupil with a set of large, sharp teeth. This change is marked by the Eye spinning rapidly and dropping the pupil. In this phase, the Eye's defense decreases by six points, making him take three more damage from any attack (see Armor for damage reduction formula). In the second phase, instead of spawning the Servant of Cthulhu, the Eye will charge at the player 3 times, take a short break and then repeat. It continues this pattern until the Eye's death, Your death (if your spawn is far from the battleground) or daybreak.

Strategy
The best strategy for new players to kill the Eye of Cthulhu is to build multiple parallel rows of wooden platforms (Picture below) so you can move freely when fighting the Eye, remember to light the area with torches. After building your platforms buy a large number of Shuriken from a Merchant, you will only need around 110, as you can re-collect many of them. The only other thing you need are Healing Potions, between 10-20 will do for your first try.

Now you are ready to fight the Eye of Cthulhu remember to aim for the iris in the first phase to kill the Servant of Cthulhu before they get near you, then just run around your platforms and try to avoid the Eye whilst throwing Shuriken at it (don't forget to heal). This strategy assumes you have obtained armor.

This is just one strategy to defeat the Eye of Cthulhu, there are hundreds of ways to kill it. Generally speaking the best weapons to kill the Eye of Cthulhu with are ranged weapons (Guns, Bows, ect), althought with good armor and/or buff potions you can defeat it with almost any weapon and at any location, time is your only constraint.







Drops

 * Demonite Ore 100%
 * Unholy Arrows 100%
 * Coins 100%
 * Gold Coin
 * Small Hearts
 * Corrupt Seeds
 * Band of Starpower
 * Black Lens (Very Rare) 1% Chance of a drop

Trivia

 * In the Alpha version, the Eye of Cthulhu had 4000 health instead of 2800.
 * The Eye of Cthulhu is most likely named after the fictional extraterrestrial entity, Cthulhu, created by horror author H. P. Lovecraft.
 * The correct pronunciation of Cthulhu has long been debated. KAH-THOO-LOO and CHA-THOO-LAH are two commonly argued pronunciations. In reality, Lovecraft intended the name to be unpronouncable, as the creature pre-dated the English language.
 * In patch 1.0.3, during multiplayer, if you pull out a Suspicious Looking Eye, an Eye of Cthulhu will spawn and your Suspicious Looking Eye will not be taken away.