What restrictions are there on the Eye of Cthulu?
The Eye of Cthulu can ONLY be manually summoned at night. Summoning the Eye of Cthulu during the day WILL result in INSTANT DEATH, and you will lose your Suspicious Eye. The Eye of Cthulu can be summoned an infinite amount of times, and if you’re fast enough to kill him you can battle him multiple times in one night, provided you have enough Suspicious Eyes. The battle itself is timed, and if day breaks before the Eye of Cthulu is defeated, he will flee and you’ll have to try again the next night. If you die during the battle, and you manually summoned him, the Eye will wait for you until daybreak, so you can return to finish him off if you’re fast enough.
