Graveblade Marauder is a uncommon Creature — Human Warrior card from Foundations Jumpstart (J25), collector number 451. Current market price: $0.21, TCGplayer market prices via Scryfall.
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) Whenever this creature deals combat damage to a player, that player loses life equal to the number of creature cards in your graveyard.