Muldrotha, the Gravetide + Kaya's Ghostform + Altar of Dementia + Pitiless Plunderer

Muldrotha, the Gravetide

Kaya's Ghostform

Altar of Dementia

Pitiless Plunderer

How it works

1. Activate Altar of Dementia by sacrificing Muldrotha.
2. Kaya's Ghostform and Pitiless Plunderer triggers.
3. Resolve the Kaya's Ghostform's trigger, returning Muldrotha to the battlefield.
4. Resolve the Pitiless Plunderer's trigger, creating a Treasure token.
5. Resolve the Altar of Dementia's ability, causing target player to mill six cards.
6. Activate Treasure token by tapping and sacrificing it, adding .
7. Cast Kaya's Ghostform from your graveyard by paying , targeting Muldrotha.
8. Repeat.