Silverquill, the Disputant (SOS 287)

Legendary Creature — Elder Dragon • Mana cost: {2}{W}{B} • Secrets of Strixhaven • Mythic

Flying, vigilance
Each instant and sorcery spell you cast has casualty 1. (As you cast that spell, you may sacrifice a creature with power 1 or greater. When you do, copy the spell and you may choose new targets for the copy.)

Illustrated by Mark Zug.