Putrid Goblin + Goblin Trashmaster + Grumgully, the Generous

Prerequisites

• There's an artifact on the battlefield.

Steps

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

Effects

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