Stalwart Successor, Goblin Bombardment, and Gravelgill Axeshark

Prerequisites

• Stalwart Successor on the battlefield
• Goblin Bombardment on the battlefield
• Gravelgill Axeshark on the battlefield

Steps

1. Activate Goblin Bombardment by sacrificing Gravelgill Axeshark When Gravelgill Axeshark dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
2. When Gravelgill Axeshark enters, Stalwart Successor triggers, putting a +1/+1 counter on Gravelgill Axeshark Resolve the Goblin Bombardment ability
3. Repeat

Results

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