Cheapest priced copy (Commander Legends: Battle for Baldur's Gate): $0.35 at Card Kingdom, near mint, their price list as of .
Lurking Green Dragon 
Creature — Dragon · 4/4 · Common · Commander Legends: Battle for Baldur's Gate · #239
Flying
This creature can't attack unless defending player controls a creature with flying.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends: Battle for Baldur's Gate | 239 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 10 June 2022Lurking Green Dragon's second ability applies only while you're declaring attackers. It is not removed from combat if the creature with flying leaves the battlefield, changes controllers, or loses flying after Lurking Green Dragon is declared as an attacker.
- 10 June 2022If a creature attacks a planeswalker, that planeswalker's controller is the defending player.