Eloise, Nephalia Sleuth + Cauldron Familiar + Peregrin Took + Altar of Dementia

Eloise, Nephalia Sleuth

Cauldron Familiar

Peregrin Took

Altar of Dementia

How it works

1. Activate Altar of Dementia by sacrificing Cauldron Familiar.
2. When Cauldron Familiar dies, Eloise's first ability triggers, creating a Clue and Food token.
3. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Cauldron Familiar's power.
4. Activate Cauldron Familiar by sacrificing a Food.
5. Eloise's second ability triggers, causing you to surveil 1.
6. Resolve the Cauldron Familiar ability, returning it from your graveyard to the battlefield.
7. When Cauldron Familiar enters the battlefield, it triggers, causing each opponent to lose 1 life and you to gain 1 life.
8. Repeat.