Dauthi Voidwalker is a rare Creature — Dauthi Rogue card from Secret Lair Drop (SLD), collector number 1760. Current market price: $15.10, TCGplayer market prices via Scryfall.
Shadow (This creature can block or be blocked by only creatures with shadow.) If a card would be put into an opponent's graveyard from anywhere, instead exile it with a void counter on it. {T}, Sacrifice this creature: Choose an exiled card an opponent owns with a void counter on it. You may play it this turn without paying its mana cost.