Farid, Enterprising Salvager + Metalwork Colossus + Weapons Manufacturing + Phantom Train

Farid, Enterprising Salvager

Metalwork Colossus

Weapons Manufacturing

Phantom Train

How it works

1. Cast Metalwork Colossus by paying 0.
2. When Metalwork Colossus enters, Weapons Manufacturing triggers, creating a Munitions token.
3. Activate Phantom Train by sacrificing Metalwork Colossus.
4. When Metalwork Colossus dies, Farid triggers, creating a Scrap token.
5. Resolve the Phantom Train ability.
6. Activate Metalwork Colossus by sacrificing the Scrap and Munitions tokens.
7. The Munitions token triggers, dealing 2 damage to any target.
8. Resolve the Metalwork Colossus ability, returning it from your graveyard to your hand.
9. Repeat.