Thief Cat

Thief Cat is a demon found in Iris and the Giant.

"This thief cat will come and take cards from my bag. I'd better keep him far away."

Location
In Path of the Giant, Thief Cats are a common enemy appearing on Floors 2, 3, 3W, 4, 5, 5B, 6B, 7, 7B, 7W, 9, 9B, 15 & 17 in all difficulties, and also Floor 6 on Easy & Classic difficulty, and Floor 1 on Nightmare difficulty.

In Path of the Ferryman, they appear on Floors 2, 4, 8, 11B, 20 on all difficulties.

Strategy
Thief Cats can only attack you from the first row, and will remove a card from your deck when they do.