Salvaging Station + Weapons Manufacturing + Clock of Omens + Extruder

Salvaging Station

Weapons Manufacturing

Clock of Omens

Extruder

How it works

1. Activate Salvaging Station by tapping it, returning the noncreature artifact with mana value 1 or less from your graveyard to the battlefield.
2. When the noncreature artifact enters the battlefield, Weapons Manufacturing triggers, creating a Munitions artifact token.
3. Activate Clock of Omens by tapping the noncreature artifact returned in step 1 and the Munitions token, untapping Salvaging Station.
4. Activate Extruder by sacrificing the noncreature artifact.
5. Repeat.