Plum Flute

Plum Flute is an unlockable activated item added in The Binding of Isaac: Repentance.

Effects[]

On use, summons Baby Plum to fight for Isaac in the current room for ~10 seconds.
- Baby Plum will always twirl, jump, then spit blood and bounce around the room before waving goodbye and flying away.
- Baby Plum does 12 contact damage per tick (24 per second), 3.5 damage per shot, and 2 damage per tick with creep (20 per second).
This item belongs to the Beelzebub set. Collecting three items from this set will transform Isaac into a giant humanoid fly.

If Isaac goes enough time (about half a minute) without hurting Baby Plum during a boss fight, she will fly away and leave behind a Plum Flute on the Boss Room pedestal.
- Damage done with Suplex! does not count as hurting Baby Plum.
- Damage done indirectly, like losing Black Hearts, does not count as hurting Baby Plum.
- Damage dealt passively by familiars such as Demon Baby, Succubus, and Psy Fly does count as hurting Baby Plum.

Angelic Prism: Baby Plum's shots that pass through the Prism will be split into four.
Error: No Book of Virtues interaction found for "Plum Flute".
BFFS! / Hive Mind: Doubles Baby Plum's contact damage, but not projectile damage. Plum is also larger.
Car Battery: Summons two Baby Plums, the Baby Plums start out overlapped but can sometimes split up when using different attacks.
Lost Cork: Affects Baby Plum's blood puddle.
Sacrificial Altar: Baby Plum can be sacrificed for free, instead of a familiar. Plum Flute can still be used as normal afterwards.

Baby-Bender: No effect.
Eraser: Plum Flute will still function normally if the boss Baby Plum is erased.

Plum Flute resembles the Poké Flute, an item that appears in various Pokémon games and is used to wake sleeping Pokémon.
This item is the only item to have a boss fight alongside Isaac as an ally, while still using the same attacks.

Bug!	If Baby Plum is spawned in a Crawl Space or The Beast fight, she will not properly bounce off walls.

Bug!	If Baby Plum is currently active when Tainted Lazarus swaps forms, Baby Plum will vanish. Once Tainted Lazarus swaps forms again, Baby plum will re-appear and continue her attacks. If she was doing her spit attack, her and her projectiles will end up stuck in place and she will not stop attacking until the player leaves the room.

Bug!	If Baby Plum is charmed by The Siren, her animation will freeze, she will stop firing bullets, and she will only be able to deal contact damage to Isaac.