Putrid Goblin, Surrak and Goreclaw, and Goblin Trashmaster

Prerequisites

• Putrid Goblin on the battlefield
• Surrak and Goreclaw on the battlefield
• Goblin Trashmaster on the battlefield

Steps

1. Activate Goblin Trashmaster by sacrificing Putrid Goblin When Putrid Goblin dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
2. When Putrid Goblin enters, Surrak and Goreclaw triggers, putting a +1/+1 counter on Putrid Goblin
3. Resolve the Goblin Trashmaster ability
4. Repeat

Results

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