Havengul Lich + Necroduality + Shambling Ghast + Yahenni, Undying Partisan

Havengul Lich

Necroduality

Shambling Ghast

Yahenni, Undying Partisan

How it works

1. Activate Havengul Lich by paying 1, allowing you to cast Shambling Ghast card from your graveyard this turn.
2. Cast Shambling Ghast from your graveyard by paying .
3. When Shambling Ghast enters, Necroduality triggers, creating a token copy of Shambling Ghast.
4. Activate Yahenni twice by sacrificing both Shambling Ghasts.
5. When the Shambling Ghasts die, they triggers, creating two Treasure tokens.
6. Resolve the Yahenni ability.
7. Activate the Treasures by tapping and sacrificing them, adding 1.
8. Repeat.

This loop turns a simple graveyard recursion engine into a relentless machine by having Havengul Lich repeatedly pull Shambling Ghast out of the graveyard for a single mana. Every time that ghast enters the battlefield, Necroduality steps in to double your trouble by churning out an exact token copy. You then feed both the original and the token to Yahenni, Undying Partisan's sacrifice ability to keep the Aether flowing. When those two ghasts hit the dirt, their dying triggers yield a pair of Treasure tokens that you can immediately crack to fund the Lich's activation fee, leaving you with an endless parade of death, sacrifices, and sparkling loot.