|Effect||Become charming to rats|
|A token of friendship between peasant and pest.|
- The blueprints are given to you by Mr. Rat upon helping him and Mrs. Rat
- All rats become charmed, and attack other enemies in the room. They do not have to be defeated to clear the room, and the player cannot hurt them directly.
- Other enemies will attack the rats if they are closer to them than you. The rats can also take damage from the environment, and can fall into pits.
- When the room is cleared, the rats will follow the player. They can push him around, which may hurt the player (upon being pushed into pits, spikes, traps and such).
- Since the rats' attack knockback, they can also push enemies into pits.
- Rat Matron will boost the other rats' damage and speed as well.