Jar of Flies

Killing an enemy adds a fly to the jar, up to a maximum of 20. On use, releases Blue Flies equal to the number of flies in the jar.

Quote

"Gotta catch 'em all?"

Effects

• Killing an enemy adds a fly to the jar, up to a maximum of 20.
• Upon use, releases Blue Flies equal to the number of flies in the jar.
• This item belongs to the Beelzebub set. Collecting three items from this set will transform Isaac into a giant humanoid fly.

Synergies

• Hive Mind - Flies are bigger and deal double damage.
• Fish Tail - Doubles the number of flies that spawn.
• Schoolbag - Flies will be gained even while the Jar of Flies is in the inactive slot.

Found in

• Shop
• Shop (Greed Mode)
• Treasure Room (Greed Mode)