飛眼怪是一種眼球狀的生成在距離克蘇魯之腦20~30方塊處的敵怪 ，它們會在戰鬥中生成。 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 減益 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！ 減益, making the 信號槍 a good choice for DPS.
- Creepers don't drop 暗影之魂, 生物群落鑰匙s, or 生物群落鑰匙模具s.
- 126.96.36.199：Now able to inflict a variety of debuffs in Expert Mode.