Chainer, Dementia Master + Su-Chi + Chromatic Orrery + Trostani, Selesnya's Voice + Altar of Dementia

Chainer, Dementia Master

Su-Chi

Chromatic Orrery

Trostani, Selesnya's Voice

Altar of Dementia

How it works

1. Activate Altar of Dementia by sacrificing Su-Chi.
2. When Su-Chi dies, it triggers, adding CCCC.
3. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Su-Chi's power.
4. Activate Chainer by paying 3 and 3 life, returning Su-Chi to the battlefield from your graveyard.
5. When Su-Chi enters the battlefield, Trostani triggers, causing you to gain life equal to Su-Chi's toughness.
6. Repeat.

This intricate loop hinges on Chainer, Dementia Master's ability to repeatedly resurrect Su-Chi from the graveyard for a modest 3 life and three black mana. Chromatic Orrery ensures that the four colorless mana generated whenever Su-Chi dies can be filtered to pay for Chainer's activation cost and keep the engine running with mana to spare. Meanwhile, Altar of Dementia turns each sacrifice into an infinite mill condition for your opponents, while Trostani, Selesnya's Voice passively rewards every resurrection by padding your life total with a steady stream of lifegain.