Guppy's Hair Ball

Item Icon
Pickup Quote	"Swing it"
Entity ID	5.100.187
Item Pool	Devil Room Devil Room
Quality	1
Item Tags
Collection Grid	(page 2, column 4, row 9) (page 2, column 4, row 4)
Unlock Method	Become Guppy

Guppy's Hair Ball is an unlockable passive item.

Effects

• Spawns a hairball familiar that loosely follows behind Isaac, blocks shots, and can be swung like a flail to damage enemies.
  • The ball deals 5 damage per tick, but grows for +2 damage when it kills an enemy — up to 5 times for a maximum of 13 damage. The damage it deals per tick (each half-second) is (level × 2) + 3.
  • The hairball level decreases upon entering a new floor: if level 2, it reverts to level 1. If level 3 or 4, it reverts to level 2. If level 5, it reverts to level 3.
• This item belongs to the Guppy set. Collecting three items from this set will transform Isaac into Guppy.

Notes

• The hairball's hitbox is the same size regardless of level.
• Killing the Blue Flies that Hush spawns does not increase its level.
• If Isaac has transformed into Guppy, Guppy's Hair Ball spawns Blue Flies when it deals damage.
• If Blindfolded, the ball occasionally spawns a Blue Fly while it's damaging an enemy.

Trivia

• This item is used in Cat Got Your Tongue (challenge #8).
• The function and flavor text of this item might reference the idioms "no room to swing a cat" and "can't swing a dead cat without hitting...".
• In the original The Binding of Isaac, Guppy's Hairball did not count towards the Guppy transformation.

The Binding of Isaac: Rebirth
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