Melira, Sylvok Outcast + Lingering Tormentor + Phantom Train

Melira, Sylvok Outcast

Lingering Tormentor

Phantom Train

How it works

1. Activate Phantom Train by sacrificing Lingering Tormentor.
2. When Lingering Tormentor dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Melira.
3. Resolve the Phantom Train ability
4. Repeat.

This loop relies on Melira, Sylvok Outcast's static ability to shut down the -1/-1 counters that would normally neutralize persist, allowing Lingering Tormentor to return to the battlefield endlessly every time it hits the graveyard. Phantom Train acts as the sac outlet that constantly bins Lingering Tormentor while growing itself larger with infinite +1/+1 counters in the process. Because Melira prevents the counter placement entirely, the persist trigger keeps firing on every iteration, turning a simple sacrifice into an endless cycle of creature deaths, enters-the-battlefield triggers, and leaving-the-battlefield triggers.