Stalwart Successor, Goblin Bombardment, and Kithkin Spellduster

Prerequisites

• Stalwart Successor on the battlefield
• Goblin Bombardment on the battlefield
• Kithkin Spellduster on the battlefield

Steps

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

Results

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