Coruscation Mage is a uncommon Creature — Otter Wizard card from Bloomburrow (BLB), collector number 131. Current market price: $2.30 (foil $3.38), TCGplayer market prices via Scryfall.
Offspring {2} (You may pay an additional {2} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) Whenever you cast a noncreature spell, this creature deals 1 damage to each opponent.