Steelburr Champion is a rare Creature — Mouse Soldier card from Bloomburrow Commander (BLC), collector number 12. Current market price: $0.37, TCGplayer market prices via Scryfall.
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.