Farid, Enterprising Salvager + Metalwork Colossus + Sly Requisitioner + Krark-Clan Ironworks

Farid, Enterprising Salvager

Metalwork Colossus

Sly Requisitioner

Krark-Clan Ironworks

How it works

1. Activate Krark-Clan Ironworks by sacrificing Metalwork Colossus, adding CC.
2. When Metlwork Colossus dies, Sly Requisitioner and Farid trigger.
3. Resolve the Sly Requisitioner trigger, creating a 1/1 Servo artifact creature token.
4. Resolve the Farid trigger, creating a Scrap artifact token.
5. Activate Metalwork Colossus by sacrificing the Servo and the Scrap token, returning Metalwork Colossus from your graveyard to your hand.
6. Cast Metalwork Colossus by paying at most 1.
7. Repeat.