This clever loop turns the mechanical quirk of persist on its head by utilizing Melira, Sylvok Outcast, whose static ability prevents creatures you control from ever receiving -1/-1 counters. Because of this protection, when Lesser Masticore dies and its persist ability triggers, it returns to the battlefield completely clean instead of entering with a counter. You can feed this relentless automaton directly into Krark-Clan Grunt's sacrifice ability, fueling endless loops that generate infinite sacrifices, deaths, and enter-the-battlefield triggers while pumping the Grunt to astronomical power.