Wildsize

In Commander, Wildsize earns its slot in stompy and Voltron decks as a cantripping combat trick: the trample rider matters when your commander is already large, and the card draw means you're not spending a resource to protect or push through. In Pauper it sees genuine consideration in green aggro shells, where two-mana cantripping pump at instant speed is legitimately efficient at common. Legacy and Vintage have enough raw power density that Wildsize doesn't register — the formats demand higher impact per card slot. Oathbreaker mirrors the Commander logic: if your planeswalker win condition runs through creature combat, Wildsize is exactly the kind of low-cost, self-replacing tool that keeps the engine running.