Chimerism is a passive item in Preyn's Collection, a mod for The Binding of Isaac. It is part of the Rotten Collection submod.

Killing an enemy grants one of the following:
+0.05 speed.
+0.5 flat damage.
+0.05 shot speed.
+1 luck.

The duration of the bonuses depends on the type of enemy that was killed:
• Normal enemy: current room.
• Mini-Boss: current floor.
• Boss: permanent.

All granted stats in Co-op are shared between players.

Killing the same boss or mini-boss in the same room twice or more will not grant additional stats.

Killing more than 3 bosses/mini-bosses or 15 enemies in the same room will prevent more stats from being granted while in the room.

Copies of the item will multiply the extra stats.

Part of the Rotten Collection mod.

Chimerism can be found in the following item pools:

The following tags are applied to this item:

• Check out the item description on the mod's external Wiki.
• Download Preyn's Collection from the Steam Workshop.