#9 · Passive Item
- This item causes many Fly enemies to move slower and alter their behavior toward Isaac.
- The following flies transform into a neutral Black Fly: Attack Fly, Dart Fly, Eternal Fly, and Ring Fly.
- The following flies retain their form and deal contact damage: Large Attack Fly, Swarm Fly, Hush Fly, Boom Fly, Red Boom Fly, Drowned Boom Fly, Sucker, and Spit.
- The following flies retain their form and do not deal contact damage: Moter, Level 2 Fly, Full Fly, Pooter, and Super Pooter.
- This item belongs to the Beelzebub (Transformation) set. Collecting three items from this set will transform Isaac into a giant humanoid fly.