Creature - Horror 1/1, 1B (2) When Abyssal Gatekeeper is put into a graveyard from the battlefield, each player sacrifices a creature.1 "There are two ways for me to pass this gate. One involves you remaining conscious." -Gerrard of the Weatherlight
Illus. Mark Tedin
10/4/2004: The "sacrifice a creature" effect is not targeted. It can affect creatures with protection from black.
4/1/2008: The player whose turn it is chooses a creature to sacrifice, then each other player in turn order chooses a creature to sacrifice, then all chosen creatures are sacrificed at the same time.