Necroduality + Rot Hulk + Woe Strider

Necroduality

Rot Hulk

Woe Strider

How it works

1. Cast Rot Hulk by paying 5.
2. When Rot Hulk enters, it and Necroduality trigger.
3. Holding priority, activate Woe Strider by sacrificing Rot Hulk.
4. Resolve the Rot Hulk trigger, failing to return anything to the battlefield.
5. Resolve the Necroduality trigger, creating a token copy of Rot Hulk.
6. When the token Rot Hulk enters, it triggers, returning Rot Hulk from your graveyard to the battlefield.
7. Repeat from step 2.

This clever graveyard loop leverages Necroduality to instantly double up every Zombie that enters the battlefield. By sacrificing Rot Hulk to Woe Strider's sacrifice outlet before its initial entry trigger resolves, you set up the graveyard so that Necroduality's copy trigger can bring the original Rot Hulk right back. As the token Rot Hulk enters, its own entry trigger recurs the original Rot Hulk once more, creating a self-sustaining loop that generates infinite deaths, enter-the-battlefield triggers, and scrys courtesy of Woe Strider.