Gatekeeper of Malakir is a uncommon Creature — Vampire Warrior card from The List (PLST), collector number ZEN-89. Current market price: $0.35, TCGplayer market prices via Scryfall.
Kicker {B} (You may pay an additional {B} as you cast this spell.) When this creature enters, if it was kicked, target player sacrifices a creature of their choice.