
Whenever an opponent discards a card, you may draw a card.
Geth's Grimoire has 2 printings, first in Darksteel (2004). EDHREC ranks it #2,315 among Commander cards. It appears most in Kefka, Court Mage // Kefka, Ruler of Ruin decks (10,298 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.