Putrid Goblin, Sling-Gang Lieutenant, and Metallic Mimic

Prerequisites

• Putrid Goblin on the battlefield
• Sling-Gang Lieutenant on the battlefield
• Metallic Mimic on the battlefield

Steps

1. Activate Sling-Gang Lieutenant by sacrificing Putrid Goblin
2. When Putrid Goblin dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Metallic Mimic
3. Resolve the Sling-Gang Lieutenant ability
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite lifegain
• Infinite lifeloss