Your search for "Abyssal Gatekeeper 31" revealed the following:
Abyssal Gatekeeper (WTH) from Weatherlight, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Mark Tedin Card Text:If Abyssal Gatekeeper is put into any graveyard from play, each player chooses and buries a creature he or she controls.
Abyssal Gatekeeper (DDC) from Duel Decks: Divine vs. Demonic, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Mark Tedin Card Text:When Abyssal Gatekeeper is put into a graveyard from the battlefield, each player sacrifices a creature.
Abyssal Gatekeeper (DVD) from Duel Decks Anthology: Divine vs. Demonic, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Mark Tedin Card Text:When Abyssal Gatekeeper dies, each player sacrifices a creature.