
All creatures get -X/-X until end of turn, where X is the number of card types among cards in your graveyard.
Deluge of Doom has 2 printings, first in Duskmourn: House of Horror Commander (2024). EDHREC ranks it #10,919 among Commander cards. It appears most in Winter, Cynical Opportunist decks (4,068 on EDHREC). 1 public deck on TCG runs it.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.