Cheapest priced copy (Bloomburrow Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Steelburr Champion 
Creature — Mouse Soldier · 1/1 · Common · Bloomburrow Commander Tokens · #10
Offspring {1}{W} (You may pay an additional {1}{W} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.)
Vigilance
Whenever an opponent casts a noncreature spell, put a +1/+1 counter on this creature.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $0.49 to $0.69 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Bloomburrow Commander | 12 | Rare | $0.49 | — |
| Bloomburrow Commander | 48 | Rare | $0.69 | — |
| Bloomburrow Commander Tokens | 10 | Common | $0.49 | $0.49 |