Goblin Welder, and Thornbite Staff

Prerequisites

• Goblin Welder on the battlefield
• 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

Steps

1. Activate Goblin Welder by tapping it, sacrificing any artifact creature you control and returning any other artifact creature from your graveyard to the battlefield
2. Goblin Welder triggers, untapping itself
3. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers