Deck of many things

1. A deck of enchanted cards from the roleplaying game Dungeons and Dragons. Most decks (75%) contain 13 cards, but a full deck consists of 22. The deck contains bad cards (Skull, The Void, Talons) as well as good cards (Gem, Vizier, Fates). Also known as: Campaign breaker
2. The way D&D players sate their gambling addiction.

DM: Okay, in the room you see-
Player: I draw two cards from my deck of many things
DM: Ffs, Keith!