Miirym, Sentinel Wyrm is a rare Legendary Creature — Dragon Spirit card from Battle for Baldur's Gate Promos (PCLB), collector number 284s. Current market price: — (foil $20.47), TCGplayer market prices via Scryfall.
Flying, ward {2} Whenever another nontoken Dragon you control enters, create a token that's a copy of it, except the token isn't legendary.