The Scary Candle, Trick Candle, and Mimic Candle resemble normal candles (although they are colored differently), but are actually enemies which materialize when attacked. When struck by a weapon, they will transform into a frail-looking humanoid creature made out of wax and fall to the floor, where they will melt away in a very short time.
Each one of these secret enemies will only appear after a particular boss has been defeated. They are found in rooms that usually have been explored long ago and where the player normally wouldn't have any reason to visit again.
Found in the Cerberus' boss room in the Catacomb once Camilla has been defeated. Has a chance to drop the Pluto Card, although a lot of kills may be required since they rarely drop the card, which is quite valuable.