Varragoth, Bloodsky Sire is a rare Legendary Creature — Demon Rogue card from Kaldheim Promos (PKHM), collector number 115s. Current market price: — (foil $10.43), 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.)