Seismic Monstrosaur

The whole point of a landcycling body is that it costs you nothing to draw: the card that would rot in your hand on a stalled board turns into a fetch for the color-fixing land you missed. This one keeps that safety valve (grab a Mountain when you are flooded on spells and short on red) but pairs it with a second escape hatch that reverses direction entirely. Once it resolves as a 6/5 trampler, the sacrifice-a-land ability turns your excess lands back into cards, so the same resource that was your floor early becomes fuel late. That symmetry sets it apart from most cycling creatures, which are pure hedges: blank in the games where you keep them, useful only in the games where you don't. Seismic Monstrosaur wants to be kept and cast, then wants to eat the surplus mana it no longer needs. Trample matters here because a 6/5 that can't be chumped forever converts board presence into a clock while the land-to-card engine refills, which means neither half of the card is dead weight in the games the other half is meant for. It is a red top-end built so the mana that flooded you and the mana that stranded you both have a job.