Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Goblin Bombardment, and Nardole, Resourceful Cyborg

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Goblin Bombardment on the battlefield
• Nardole, Resourceful Cyborg on the battlefield

Steps

1. Activate Goblin Bombardment by sacrificing Nardole When Nardole dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it
2. Activate Goblin Bombardment by sacrificing Nardole When Nardole dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Resolve both Goblin Bombardment abilities from step 1 and 3
4. Repeat

Results

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