Keeper's Kin
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Keeper's Kin is an unlockable passive item added in The Binding of Isaac: Repentance.
Effects
- If Isaac is in a room with enemies, rocks and rock-like obstacles will occasionally spawn blue spiders.
- Causes all rocks to spawn 0-2 blue spiders when destroyed.
- This item belongs to the
Spider Baby set. Collecting three items from this set will transform Isaac into a humanoid spider.
Synergies
Compost : Will double the current amount of blue spiders.
D12: Due to the high tendency of replacing rocks with 
TNT, it allows for easy destruction of nearby rocks, resulting in lots of blue spiders.
Leo / 
Mega Mush / 
Notched Axe / 
Stompy / 
Sulfuric Acid / 
Terra / 
Thunder Thighs: As Isaac can break all reachable rocks, he can amass a lot of blue spiders.- Mega Mush : When Isaac destroys blocks it will produce blue spiders.
