The Marvelous Scientist
{1}{U}{R}Legendary Creature — Human Wizard
As this creature enters the battlefield, choose cosplay or science. • Cosplay — Whenever you cast a creature or planeswalker spell, this creature's base power and toughness each become equal to that spell's mana value until end of turn. • Science — Whenever you cast an instant or sorcery spell, this creature deals 2 damage to each opponent.