Leapfrog

Three power for three mana reads aggressive, and one toughness is the invoice: this Frog dies to nearly anything that trades back, so the wings are never about survival, only about clearing a blocker on the swing. The evasion is a static ability gated on a per-turn condition rather than a triggered one, which is what makes the sequencing matter. The game only checks whether you have cast an instant or sorcery this turn, so a cheap spell before combat flips flying on for the attack, and once the turn ends the condition resets. That does not lock the Frog to the ground on defense, though: cast an instant during the opponent's turn (a cantrip, a piece of removal, a counter) and the wings come back, letting it block a flier as readily as it swings past one. The design is a payoff stapled to a body rather than a standalone threat, which ties it to a spells-heavy shell where you were going to cantrip or point removal anyway and the evasion is the reward for doing it. It suits a controlling-tempo deck's natural rhythm: develop, cast something useful, and let the Frog carry damage over a stalled board or hold the sky when you have a spell to spend at the wrong moment. As a common-rarity design, it bridges an aggressive early curve into a spell-matters plan, handing you evasion for play patterns the deck already wanted.