Undermountain Adventurer is a rare Creature — Giant Warrior card from Commander Legends: Battle for Baldur's Gate (CLB), collector number 260. Current market price: $0.36 (foil $0.40), TCGplayer market prices via Scryfall.
Vigilance When this creature enters, you take the initiative. {T}: Add {G}{G}. If you've completed a dungeon, add six {G} instead.
All Commander Legends: Battle for Baldur's Gate cards and prices