Jenara, Asura of War

A Bant legendary creature whose entire pitch is the activated ability, not the body. The 3/3 flier is fragile on its own, but the pump has no cap and no sorcery-speed restriction, which is the whole point: you can hold up open mana through your opponents' turns and dump it all into Jenara at instant speed on the crackback, turning a small evasive threat into a lethal one before anyone gets a clean removal window. That timing is what separates her from a creature you grow with auras or equipment; she pumps on her own schedule, and the counters stick around, so a single instant-speed shrink or a chump-then-trade does nothing to slow her once the mana is online. The danger to the investment is the same as for any counter-stacked threat: bounce and exile reset everything, and bounce is especially punishing here because returning her to hand strips every counter you paid for. For a three-color legend costing one mana of each color, that self-sufficiency is unusual. She asks for almost no support: a sword that grants protection or trample, a free turn, and white mana to keep feeding her. The cost is that the growth is mana-hungry and additive rather than explosive, so she rewards a long game with spare white mana every turn. As an early example of a cheap multicolor legend who carries her own win condition rather than enabling someone else's, she remains a clean blueprint for built-in-pump voltron that later cards revisited in louder ways.