Until end of turn, whenever a nonblack creature enters the battlefield, if an opponent has 16 or less life, target Human gets -13/-3 until end of turn.
Gruesome Apocalypse {1B} |Sorcery| You draw a card and you lose 1 life. / Until end of turn, whenever a nonblack creature enters the battlefield, if an opponent has 16 or less life, target Human gets -13/-3 until end of turn.