飞眼怪是一种眼球状的生成在距离克苏鲁之脑20~30方块处的敌怪 ，它们会在战斗中生成。 They orbit the Brain of Cthulhu during the first phase, following the boss even as it teleports, acting as a shield of sorts. Once all Creepers are defeated, the Brain of Cthulhu continues the fight in its second phase, and the Creepers never appear again during the battle. They are immune to the 困惑 减益 and drop 心s only when the player isn't at maximum 生命值 (this doesn't affect other drops). In extremely rare cases, creepers may not appear at all, making the Brain of Cthulhu invulnerable.
- Creepers are susceptible to the 着火了！ 减益, making the 信号枪 a good choice for DPS.
- Creepers don't drop 暗影之魂, 生物群落钥匙s, or 生物群落钥匙模具s.
- 220.127.116.11：Now able to inflict a variety of debuffs in Expert Mode.