
Whenever a player casts a spell, that player discards a card.
Oppression has 6 printings, first in Urza's Saga (1998). EDHREC ranks it #3,208 among Commander cards. It appears most in Tergrid, God of Fright // Tergrid's Lantern decks (7,899 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.