Occasionally, a Chest will turn out to be a mimic. There are a few ways you can check:
- After clearing a chest room, the chest will not unlock, and (if they were closed) the doors will not open.
- If a mob walks into it, the chest will be pushed around.
- Any attacks you make that hit it in any way will cause it to aggro and attack you.
- When you press your map button during combat, rooms with a Mimic in them will not show the chest symbol.