Cheapest priced copy (Bloomburrow): $0.35 at Card Kingdom, near mint, their price list as of .
Brambleguard Captain 
Creature — Mouse Soldier · 2/3 · Uncommon · Bloomburrow · #127
At the beginning of combat on your turn, target creature you control gets +X/+0 until end of turn, where X is this creature's power.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Bloomburrow | 127 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 26 July 2024If Brambleguard Captain’s power is negative as its ability resolves, the target creature will get +0/+0 until end of turn. At least they’ll know Brambleguard Captain appreciates them.
- 26 July 2024The value of X is calculated only once, as Brambleguard Captain’s ability resolves.