Goblin Welder, Esper Sojourners, Dross Scorpion, and Liquimetal Coating

Prerequisites

• Goblin Welder on the battlefield
• Esper Sojourners in the graveyard
• Dross Scorpion on the battlefield
• Liquimetal Coating on the battlefield
• Goblin Welder does not have summoning sickness

Steps

1. Activate Liquimetal Coating by tapping it, causing Goblin Welder to become an artifact in addition to its other types until end of turn
2. Activate Goblin Welder by tapping it, sacrificing Dross Scorpion and returning Esper Sojourners from your graveyard to the battlefield
3. Dross Scorpion triggers, untapping Goblin Welder
4. Activate Goblin Welder by tapping it, sacrificing Esper Sojourners and returning Dross Scorpion from your graveyard to the battlefield
5. Esper Sojourners triggers, untapping Goblin Welder
6. Repeat from step 2

Results

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