为 锻火机械兽 寻找最佳的标准套牌，包括其胜率、热度，以及该牌在万智牌：竞技场中的合法赛制！
Prototype — 3/2
At the beginning of your upkeep, return target creature card with power less than this creature's power from your graveyard to the battlefield. Its base power perpetually becomes equal to this creature's power.
