Putrid Goblin + Surrak and Goreclaw + Goblin Trashmaster

Putrid Goblin

Surrak and Goreclaw

Goblin Trashmaster

How it works

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