Activate Yahenni by sacrificing Cauldron Familiar.
Activate Cauldron Familiar by sacrificing a Food, returning Cauldron Familiar to the battlefield from your graveyard.
Cauldron Familiar and Quintorius, History Chaser trigger.
Resolve the Quintorius, History Chaser trigger, creating a token and a Food token.
Resolve the Cauldron Familiar trigger, causing each opponent to lose 1 life and you to gain 1 life.
Repeat
This clever loop centers around sacrificing Cauldron Familiar to Yahenni, Undying Partisan, which immediately fuels the cat's ability to leap right back out of your graveyard by consuming a Food. Peregrin Took transforms that incoming Food into an absolute feast, generating extra Food tokens whenever tokens are created to keep your engine humming indefinitely. Meanwhile, Quintorius, History Chaser watches cards leave your graveyard to flood the board with Spirit tokens, completing a resilient and self-sustaining cycle of life drain, card draw, and endless sacrifices.