Boneshard Slasher is a uncommon Creature — Horror card from Torment (TOR), collector number 50. Current market price: $0.30 (foil $1.55), TCGplayer market prices via Scryfall.
Flying Threshold — As long as there are seven or more cards in your graveyard, this creature gets +2/+2 and has "When this creature becomes the target of a spell or ability, sacrifice it."