Mite Overseer + Ashnod's Altar + Leyline of Vitality + Stridehangar Automaton

Mite Overseer

Ashnod's Altar

Leyline of Vitality

Stridehangar Automaton

How it works

1. Activate Mite Overseer by paying 3W/P, creating two creature tokens.
2. When the creature tokens enter the battlefield, Leyline of Vitality triggers twice, causing you to gain 2 life.
3. Activate Ashnod's Altar twice by sacrificing the creature tokens, adding CCCC.
4. Repeat.

This brilliant engine centers around Stridehangar Automaton, whose replacement effect ensures that every single token creation yields an extra Thopter alongside the requested Mite. By paying into Mite Overseer's ability, you create two distinct artifact creatures at once, instantly triggering Leyline of Vitality twice to pad your life total while fueling your board. You can then feed both newly minted tokens directly into Ashnod's Altar to generate a surplus of colorless mana—more than enough to pay the activation cost again and keep the loop running indefinitely.