Metalwork Colossus + Warren Soultrader + Aetherflux Reservoir + Stridehangar Automaton

Metalwork Colossus

Warren Soultrader

Aetherflux Reservoir

Stridehangar Automaton

How it works

1. Cast Metalwork Colossus by paying 0.
2. Aetherflux Reservoir triggers, causing you to gain 1 life for each spell you've cast this turn.
3. Activate Warren Soultrader by paying 1 life and sacrificing Metalwork Colossus, creating a 1/1 Thopter artifact creature token and a Treasure token.
4. Activate Metalwork Colossus by sacrificing the Treasure and Thopter, returning Metalwork Colossus from your graveyard to your hand.
5. Repeat.

This ingenious loop relies on turning a massive noncreature artifact presence—often enabled by your other permanents—into a free casting of Metalwork Colossus, which then fuels Warren Soultrader by sacrificing it to generate resources. The real magic happens through Stridehangar Automaton, which turns that sacrifice into both a Treasure and a bonus 1/1 colorless Thopter artifact creature token, providing the exact artifacts needed to pay Metalwork Colossus's recursion cost from the graveyard back to your hand. As you endlessly loop this cycle, Aetherflux Reservoir effortlessly tracks your skyrocketing spell count and lifegain to convert the entire engine into lethal, game-ending damage.