This clever loop revolves around Isilu, Carrier of Twilight (the transformed face of Eirdu, Carrier of Dawn), which grants persist to your other nontoken creatures, allowing Marionette Apprentice to keep returning from the dead with a -1/-1 counter. Viscera Seer provides the crucial free sacrifice outlet to send Marionette Apprentice to the graveyard, while also letting you filter your draws with infinite scry triggers along the way. Every time Marionette Apprentice re-enters the battlefield, its fabricate 1 ability counters its own drawback by placing a +1/+1 counter that instantly cancels out the -1/-1 counter via state-based actions. Finally, Marionette Apprentice's own triggered ability weaponizes this endless cycle of death, draining your opponents' life totals down to zero with every single loop.