Infinite +1/+1 counters on a creatureInfinite creature ETBInfinite creature LTBInfinite death triggersInfinite magecraft triggersInfinite creature sacrifice triggers
How it works
Cast Stir the Grave by paying 3.
Holding priority, cast Dualcaster Mage by paying its mana cost.
When Dualcaster Mage enters, it triggers, targeting Stir the Grave.
Holding priority, activate Phantom Train by sacrificing Dualcaster Mage.
Resolve the Dualcaster Mage trigger, copying Stir the Grave
Resolve the Stir the Grave copy, returning Dualcaster Mage from your graveyard to the battlefield.
Repeat from step 3.
This loop relies on an endlessly recurring cycle of resurrection and sacrifice, fueled by the clever interplay between Stir the Grave and Dualcaster Mage. When you cast Stir the Grave, you float the spell's target while Dualcaster Mage drops in with flash to copy it, targeting the original sorcery. Before that copy resolves, Phantom Train steps in to sacrifice Dualcaster Mage, stoking its own fires with a +1/+1 counter and sending the Mage straight to the graveyard. The resolved copy of Stir then brings Dualcaster Mage right back to the battlefield, restarting the entire chain to generate infinite enter-the-battlefield, death, and sacrifice triggers.