Detritivore

Suspend turned a clunky removal package into something almost graceful here: each time counter that ticks off destroys a nonbasic land, so the cost you paid to set it up doubles as the schedule on which it dismantles an opponent's manabase. Pay for five counters and you have promised five upkeeps of land destruction, one per turn, with the creature itself arriving at the end as a payout rather than the point. That delayed payout is the wrinkle in the body. Its power and toughness count nonbasic lands sitting in your opponents' graveyards, which means the suspend mechanic and the stat line are the same engine viewed twice: every land you blow up while it waits in exile is a land that will be feeding the Lhurgoyf when it finally lands. The body is a tally of the destruction the suspend clock has already done, which is why the natural way to deploy it is suspended rather than hard-cast; pay the into an opponent with a clean graveyard and you resolve a 0/0 that does nothing, while the suspend route both builds the body and earns it, destroying one land per counter on the way in. The X-can't-be-zero clause keeps the suspend cost honest: there is no free suspend that skips the land destruction entirely. Like the Lhurgoyfs before it, the size is borrowed from the graveyard, but this is the one that fills that graveyard itself, on a timer it sets when you suspend it.