Eye Of Cthulhu

Info
The Eye Of Cthulhu (EoC) is a Pre-Hardmode boss and the second easiest boss in all Terraria. Its first phase is a bloodshot eye with green and blue rings around its very large pupil. At its rear, it has multiple retinal chords that flap behind it when it flies. In its second phase the eye sheds its pupil and exposes its large mouth with razor sharp teeth. When shedding its pupil, the eye spins at a very fast rate. The eye of Cthulhu is possibly a reference to H.P Lovecraft's Cthulhu monster. The eye is later revealed to be a fake, when fighting the moon lord multiple True Eye Of Cthulhus spawn, of which are invincible and fire lasers. The eye could also be related to the Twins, though unlikely since the Twins are mechanical. It also has a resemblance to the Creepers that spawn when fighting The Brain Of Cthulhu, both being eyes.

The Eye will attack the player by ramming into them, and it will also spawn many Servants Of Cthulhu. Later in the fight, it will perform a chain attack, continually ramming at the player at an excessively high speed. In expert and Master Modes, the Eye will become very aggressive, and spawn more Servants Of Cthulhu.

To summon The EoC, you must use the Suspicious Looking Eye. They eye can be crafted at a Demon/Crimson Altar for six lenses (dropped by demon eyes), or it can rarely be found in chests. Also, the EoC has a 1/3 chance of spawning randomly at night if:


 * 1) One or more player(s) has 200 health and 10+ defence.
 * 2) Three NPCs have been found.
 * 3) The Eye has not yet been defeated.

Strategies

 * If possible, always have a nearby house with a nurse and a dryad living there. The nurse can completely refill your health for a few silver coins, and the Dryad generates the 'Dryad's Blessing' debuff which increases your defence. She also generates the Dryad's Bane debuff that negatively effects enemies. Also, make a long, flat arena, with heart lanterns, Campfires and Fireflies/Stars In Bottles.
 * If you have obtained the Slimy Saddle, then equip it for the battle. The saddle will allow you to jump on the EoC unharmed, making the bossfight incredibly easier.
 * They Eye Of Cthulhu is Vulnerable to not only the On Fire! debuff, but also Poisoned. For this reason, weapons such as the Poisoned Knife and Fire Arrows are highly recommended. They are also ranged weapons, which work extremely well against the eye.
 * If you can buy the Minishark off the Arms Dealer, It will prove very useful. Build your arena with wooden platforms above ground, about jumping height from each other. Keep going until you think you wouldn't need to go any higher. Then, gather at least 150 musket balls (each costs 7 copper from the arms dealer, so that amounts to 10 silver and 50 copper for enough bullets). When you spawn the eye, continually circle around it and fire with the Minishark. Eventually, it will start to do its chain lunges, and when that happens make sure you have turned on auto aim. The gun will then fire at it regardless, and you will have to do some evasive manoeuvres. This method costs a lot, but if you are further on in the game it is recommended for farming.

Achievements and Usefulness
For Defeating The Eye Of Cthulhu, you earn the achievement Eye On You.


 * The Eye Of Cthulhu drops the Shield Of Cthulhu, which is a very helpful item
 * EoC drops 4 gold, which is quite a lot of money in the early stages of the game
 * Also, The Eye drops Crimtane/Demonite Ore, of which you can use to make The Deathbringer Pickaxe. The Deathbringer is the quickest obtainable pickaxe you can mine Hellstone and Meteorite with. Also, you can make the Blood Butcherer or the Light's Bane, which you need to make the Night's Edge.