Dr. Madison Li + Decoction Module + Intruder Alarm + Myr Battlesphere + Phyrexian Altar

Dr. Madison Li

Decoction Module

Intruder Alarm

Myr Battlesphere

Phyrexian Altar

How it works

1. Activate Dr Madison Li's third ability by tapping it and paying EEEEE, returning Myr Battlesphere from your graveyard to the battlefield.
2. When Myr Battlepshere enters the battlefield, it, Intruder Alarm and Decoction Module triggers.
3. Resolve the Intruder Alarm trigger, untapping all creatures.
4. Resolve the Decoction Module trigger, causing you to get E.
5. Resolve the Myr Battlesphere trigger, creating four 1/1 Myr artifact creature tokens.
6. When the Myrs enter the battlefield, Intruder Alarm and Decoction Module trigger four times.
7. Resolve all Intruder Alarm triggers, untapping all creatures.
8. Resolve all Decoction Module triggers, causing you to get EEEE.
9. Activate Phyrexian Altar by sacrificing Myr Battlesphere, adding one mana of any color.
10. Repeat.

This intricate loop relies on looping Myr Battlesphere's entry triggers to flood the board with Myrs, using Decoction Module to continuously bank the energy needed to keep Dr. Madison Li resurrecting the Battlesphere from your graveyard. Meanwhile, Intruder Alarm turns every single creature entering the battlefield into an untapped lifeline, ensuring your entire board resets itself instantly. Finally, Phyrexian Altar transforms your endless stream of sacrificial fodder into an infinite supply of colored mana, letting you fuel the engine indefinitely.