Miirym, Sentinel Wyrm is a rare Legendary Creature — Dragon Spirit card from Commander Legends: Battle for Baldur's Gate (CLB), collector number 431. Current market price: $4.43 (foil $5.67), 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.
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