Head of the Class

Creature — Kithkin Cleric2/2

The first spell you cast during each of your turns that targets a creature costs {W}{B} less to cast. This effect reduces only the amount of colored mana you pay. Repartee — Whenever you cast an instant or sorcery spell that targets a creature, this creature perpetually gets +1/+1.

Not legal in Commander

View Head of the Class on Scryfall