Cheapest priced copy (Commander Legends: Battle for Baldur's Gate): $0.35 at Card Kingdom, near mint, their price list as of .
Ambitious Dragonborn 
Creature — Dragon Barbarian · 0/0 · Common · Commander Legends: Battle for Baldur's Gate · #213
This creature enters with X +1/+1 counters on it, where X is the greatest power among creatures you control and creature cards in your graveyard.
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 | 213 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 10 June 2022Ambitious Dragonborn is not yet on the battlefield when its effect looks for the creature or creature card with the greatest power, so any creatures that have a bonus to their power based on the number of creatures on the battlefield won't count it until after it enters with counters.