Artifact Creature — Masticore

At the beginning of your upkeep, sacrifice Molten-Tail Masticore unless you discard a card.
{4}, Exile a creature card from your graveyard: Molten-Tail Masticore deals 4 damage to target creature or player.
{2}: Regenerate Molten-Tail Masticore.

Artist(s): Whit Brachna