Myrkul, Lord of Bones is a rare Legendary Creature — God card from Battle for Baldur's Gate Promos (PCLB), collector number 287s. Current market price: — (foil $1.90), TCGplayer market prices via Scryfall.
As long as your life total is less than or equal to half your starting life total, Myrkul has indestructible. Whenever another nontoken creature you control dies, you may exile it. If you do, create a token that's a copy of that card, except it's an enchantment and loses all other card types.