Metalwork Colossus + Warren Soultrader + Aetherflux Reservoir + Worldwalker Helm

Metalwork Colossus

Warren Soultrader

Aetherflux Reservoir

Worldwalker Helm

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 Map and a Treasure token.
4. Activate Metalwork Colossus by sacrificing the Treasure and Map, returning Metalwork Colossus from your graveyard to your hand.
5. Repeat.
6. Once you have infinite life, you may activate Aetherflux Reservoir infinitely to deal infinite damage to any target(s).

This infinite loop turns free artifact recursion into a lethal death-ray by leaning into the cost-reduction and token-doubling mechanics of the board. With the total mana value of your noncreature artifacts reducing the cost of Metalwork Colossus to zero, you can repeatedly cast the massive automaton for free. Each casting triggers Aetherflux Reservoir to steadily pad your life total, providing the necessary resource to fuel Warren Soultrader's sacrifice outlet. Meanwhile, Worldwalker Helm acts as the engine's multiplier, turning every sacrificed creature into an extra Map token alongside your new Treasure token, which then funds the Colossus's return from the graveyard.