Fiend Artisan (Promo Pack) [Ikoria: Lair of Behemoths Promos]

Fiend Artisan gets +1/+1 for each creature card in your graveyard.
XB/G, T, Sacrifice another creature: Search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle. Activate only as a sorcery.