Balmor, Battlemage Captain (DMU 196)

Legendary Creature — Bird Wizard • Mana cost: {U}{R} • Dominaria United • Uncommon

Flying
Whenever you cast an instant or sorcery spell, creatures you control get +1/+0 and gain trample until end of turn.

"Even the most hardened armies are ill-equipped to defend against an onslaught from the sky."

Illustrated by Bram Sels.