Thermopod + Naru Meha, Master Wizard + Extract from Darkness

Thermopod

Naru Meha, Master Wizard

Extract from Darkness

How it works

1. Cast Extract from Darkness by paying its mana cost
2. Holding priority, cast Naru Meha by paying its mana cost.
3. When Naru Meha enters, it triggers, targeting Extract from Darkness.
4. Holding priority, activate Thermopod by sacrificing Naru Meha.
5. Resolve the Naru Meha trigger, copying Extract from Darkness
6. Resolve the Extract from Darkness copy, causing each player to mill two cards and returning Naru Meha from your graveyard to the battlefield.
7. Repeat from step 3.

This loop relies on an infinite recursion of resurrection and sacrifice, turning Extract from Darkness into a self-sustaining engine. When you cast Extract from Darkness and follow it with Naru Meha, Master Wizard, the Wizard's enters-the-battlefield ability goes on the stack to copy the original spell. Before that copy resolves, you use Thermopod to sacrifice Naru Meha for red mana, neatly sidestepping the legend rule while sending her to the graveyard. The resolved copy of Extract from Darkness then mills both players and immediately returns Naru Meha from your graveyard to the battlefield, restarting the cycle and letting you generate infinite red mana alongside endless sacrifices and triggers.