Quag Vampires is a common Creature — Vampire Rogue card from Conspiracy (CNS), collector number 122. Current market price: $0.11 (foil $0.52), TCGplayer market prices via Scryfall.
Multikicker {1}{B} (You may pay an additional {1}{B} any number of times as you cast this spell.) Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) This creature enters with a +1/+1 counter on it for each time it was kicked.