Encroaching Mycosynth, Scrap Welder, and Goblin Welder

Prerequisites

• Encroaching Mycosynth on the battlefield
• Scrap Welder on the battlefield
• Goblin Welder in the graveyard
• You have a static effect that grants your creatures haste

Steps

1. Activate Scrap Welder by tapping it, sacrificing itself and returning Goblin Welder from your graveyard to the battlefield
2. Activate Goblin Welder by tapping it, sacrificing itself and returning Scrap Welder from your graveyard to the battlefield
3. Repeat

Results

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