Varragoth, Bloodsky Sire is a rare Legendary Creature — Demon Rogue card from Kaldheim (KHM), collector number 309. Current market price: $3.71 (foil $6.38), TCGplayer market prices via Scryfall.
Deathtouch Boast — {1}{B}: Target player searches their library for a card, then shuffles and puts that card on top. (Activate only if this creature attacked this turn and only once each turn.)