Eye of Cthulhu

Creator notes

With this datapack installed, you can find the "Suspicious Eye" from the game Terraria and use it to summon the new boss, the Eye of Cthulhu. Killing this boss will reward you, but be careful. Similar to Terraria, the boss has two phases: the first phase is normal. The boss simply flies around and occasionally approaches to deal damage. The second phase is more challenging, as the eye bursts open, revealing teeth that the boss can use to destroy blocks and deal more damage. During this phase, the boss is also invulnerable to projectiles. In addition to fighting him, it will be nighttime until he or you die, and all nearby undead will be faster and stronger.