Screamer-Killer is a rare Creature — Tyranid card from Warhammer 40,000 Commander (40K), collector number 84. Current market price: $0.58, TCGplayer market prices via Scryfall.
Trample Bio-Plasmic Scream — Whenever you cast a creature spell with mana value 5 or greater, this creature deals 5 damage to any target.