Nova Chaser

Ten power for four mana, with trample, is a rate that should end games before anyone draws another card; the catch is that this body has two toughness and a tax it collects before it ever swings. Champion turns the creature into a swap: it eats another Elemental on the way in, exiling that one to keep itself on the table. That is the whole tension. The exiled card is hostage to this one's survival, so when a removal spell, a chump block, or a sweeper takes the 10/2 down, the championed Elemental snaps back, but the giant is gone and you are even on bodies. The design rewards championing something with a meaningful enters-the-battlefield trigger, since that trigger fires again on the return: the tax buys you a second use of an Elemental already on the board, not just a parking spot for one. The two-toughness frame keeps the rate honest in the way that matters, since anything that can profitably block or burn the attacker also unwinds the whole arrangement. It is a beater priced like a finisher and built like a sacrifice loop, asking you to feed a standing Elemental into one enormous, fragile threat and hope it connects once.