
Target creature gets -X/-X until end of turn, where X is the number of cards in your hand.
Nightmarish End has 1 printing, first in Journey into Nyx (2014). EDHREC ranks it #27,662 among Commander cards. It appears most in Kagemaro, First to Suffer decks (17 on EDHREC). It has 1 official ruling.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.