Peregrin Took + Cauldron Familiar + Phyrexian Altar + Insidious Roots

Peregrin Took

Cauldron Familiar

Phyrexian Altar

Insidious Roots

How it works

1. Activate Phyrexian Altar by sacrificing Cauldron Familiar, adding one mana of any color.
2. Activate Cauldron Familiar by sacrificing a Food, returning Cauldron Familiar to the battlefield from your graveyard.
3. Cauldron Familiar and Insidious Roots trigger.
4. Resolve the Insidious Roots trigger, creating a 0/1 green Plant creature token and a Food artifact token, and then putting a +1/+1 counter on each Plant you control.
5. Resolve the Cauldron Familiar trigger, causing each opponent to lose 1 life and you to gain 1 life.
6. Repeat

This loop turns the humble cat-and-oven dynamic into an infinite engine by feeding Cauldron Familiar directly to Phyrexian Altar to fund its own recursion. Insidious Roots capitalizes on that recursive journey by generating a Plant token every time the cat leaves your graveyard, while Peregrin Took steps in to ensure every single token-making event also floods your battlefield with extra Food. Together, these pieces create a closed-loop ecosystem where the mana from the Altar and the resulting tokens feed each other endlessly, draining your opponents' life totals while growing your board to staggering proportions.