Sidisi, Regent of the Mire + Karmic Guide + Thermopod + Giant-Sized Flying Ant

Sidisi, Regent of the Mire

Karmic Guide

Thermopod

Giant-Sized Flying Ant

How it works

1. Activate Sidisi by tapping it and sacrificing Giant-Sized Flying Ant, returning Karmic Guide from your graveyard to the battlefield.
2. When Karmic Guide enters the battlefield, it triggers, returning Giant-Sized Flying Ant from your graveyard to the battlefield.
3. When Giant-Sized Flying Ant enters the battlefield, it triggers, untapping Sidisi.
4. Activate Thermopod by sacrificing Karmic Guide.
5. Repeat.

This clever recycling loop is anchored by Sidisi, Regent of the Mire, whose tap ability lets you trade up by sacrificing a creature of mana value $X$ to pull a creature of mana value $X+1$ straight from your graveyard. You kick off the chain by sacrificing Giant-Sized Flying Ant to return Karmic Guide, whose own entry trigger immediately brings the Giant-Sized Flying Ant right back. As a bonus, Giant-Sized Flying Ant's entry trigger conveniently untaps Sidisi, while Thermopod stands ready to sacrifice Karmic Guide for red mana whenever you need to reset the loop.