- Goblin Welder and Thornbite Staff on the battlefield.
- Thornbite Staff attached to Goblin Welder.
- Goblin Welder does not have summoning sickness.
- You control at least one nontoken artifact creature.
- You have at least one artifact creature in your graveyard.
- Activate Goblin Welder by tapping it, sacrificing any artifact creature you control and returning any other artifact creature from your graveyard to the battlefield.
- Goblin Welder triggers, untapping itself.
- Infinite LTB.
- Infinite ETB.
- Infinite sacrifice triggers.
- Infinite death triggers.