Necroduality + Rot Hulk + Spawning Pit

Necroduality

Rot Hulk

Spawning Pit

How it works

1. Cast Rot Hulk by paying 5.
2. When Rot Hulk enters, it and Necroduality trigger.
3. Holding priority, activate Spawning Pit 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 loop hinges on the relentless synergy between Necroduality and Rot Hulk, which naturally trigger each other as undead legions rise and return. When Rot Hulk enters the battlefield, Necroduality steps in to double your forces with a fresh token copy, which in turn leverages its own entry trigger to continuously pull the original Rot Hulk right back out of your graveyard. Spawning Pit plays a vital role here as a clean sacrifice outlet that lets you kick off the loop instantly by putting the original Hulk into the graveyard before its own resurrection trigger even resolves, all while leaving behind a trail of charge counters and Spawn artifact creature tokens for your trouble.