Mite Overseer + Krark-Clan Ironworks + Soul Warden + Stridehangar Automaton

Mite Overseer

Krark-Clan Ironworks

Soul Warden

Stridehangar Automaton

How it works

1. Activate Mite Overseer by paying 3W/P, creating a 1/1 Thopter and a 1/1 Phyrexian Mite artifact creature token.
2. When the Phyrexian Mite and Thopter enter, Soul Warden triggers twice, causing you to gain 2 life
3. Activate Krark-Clan Ironworks twice by sacrificing the Phyrexian Mite and Thopter, adding CCCC.
4. Repeat.

This brilliant looping engine leverages the token-doubling replacement effect of Stridehangar Automaton to generate both a Phyrexian Mite and an extra Thopter whenever you activate Mite Overseer's activation cost. Each time these two artifacts flood the board, Soul Warden capitalizes on their arrival to steadily pad your life total, neutralizing the life payments required to fuel the Overseer. Finally, Krark-Clan Ironworks feeds on the newly created artifact creatures, sacrificing them to generate a surplus of colorless mana that keeps the cycle spinning indefinitely.