Paragon of Open Graves is a uncommon Creature — Skeleton Warrior card from The List (PLST), collector number M15-111. Current market price: $0.18, TCGplayer market prices via Scryfall.
Other black creatures you control get +1/+1. {2}{B}, {T}: Another target black creature you control gains deathtouch until end of turn. (Any amount of damage it deals to a creature is enough to destroy it.)