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If Chaos Data can grant the effect that contains item effects, remove the effects and spawn the contained items. Otherwise, remove Chaos Data and randomly enhance one of Rin's following 6 abilities:
Power
For each enhancement, Rin fires one additional tear when shooting.
Health
On first enhancement, Rin becomes can possess health but cannot have Red Heart containers. And gains +1 Soul Hearts and +1 extra lives. Any item that gives Red Heart containers will grant a Soul Heart instead.
On second enhancement, Rin becomes can have Red Heart containers. And gains +1 full Red Heart container and +1 extra lives.
For each subsequent enhancement, grants +2 extra lives.
Bomb
For each enhancement, grants +5 bombs. Increases 100% damage and 25% blast radius of Rin's bombs.
On first enhancement, additionally grants immunity to explosions.
Error
For each enhancement, upon taking down the next floor, spawns an additional I AM ERROR room, whenever possible.
Code
For each subsequent enhancement, increases the maximum number of effects Chaos Data can provide by 1.
Modulation and demodulation
On first enhancement, enemies have a 10% chance to devolve into weaker variants upon spawning, akin to D10. Any pickups spawned when entering or clearing a room have a 10% chance to double or be rerolled into rarer pickups.
For each subsequent enhancement, all chance increase by 10%, up to a maximum of 80%.
Transformations
This item contributes towards the Bookworm transformation. Collecting 3 items from this set will make Isaac fire an extra tear 25% of the time.