Dragon-Style Twins

Double strike and prowess on the same body is a multiplier stacked on a multiplier, and that is the whole design conceit. Each noncreature spell adds +1/+1, but double strike means every point of that buff lands twice in combat: a single cantrip turns a 3/3 into a 4/4 that hits for eight, and a second spell makes it ten. The math escalates faster than the mana spent, which is why this is a finisher for a deck built on cheap interaction rather than a midrange threat that stands on its own at five. The tension is the body. A 3/3 for five sets up a payoff that the rest of the creature cannot defend: it dies to almost anything before the combat step where the spells go off, so the card asks for either protection or a turn where you can untap with mana up and commit. Pay the cost and the swing is genuinely lethal-grade; fail to set it up and you have overpaid for a creature that trades down. It belongs to the small family of red creatures that reward casting spells in combat, and among them it leans hardest on spell velocity: its damage output scales with how many noncreature spells you can chain in a single attack step rather than capping at a single trigger.