This loop relies on the constant recycling of Marionette Master to drain your opponents out of the game. You begin by using Goblin Bombardment to sacrifice Marionette Master, which triggers its eventual return thanks to the persist ability granted by the twilight side of Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight. As Marionette Master returns to the battlefield, the -1/-1 counter it receives is immediately neutralized by a +1/+1 counter placed by its own fabricate ability, allowing the cycle to repeat indefinitely. Meanwhile, Marionette Master's triggered ability ensures that every time an artifact—or in this case, the creature itself—is put into a graveyard from the battlefield, its massive power turns into direct life loss for your opponents.