Gorgon Recluse is a common Creature — Gorgon card from Commander 2019 (C19), collector number 116. Current market price: $0.28, TCGplayer market prices via Scryfall.
Whenever this creature blocks or becomes blocked by a nonblack creature, destroy that creature at end of combat. Madness {B}{B} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)