Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Blasting Station, and Hancock, Ghoulish Mayor

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Blasting Station on the battlefield
• Hancock, Ghoulish Mayor on the battlefield

Steps

1. Activate Blasting Station by tapping it and sacrificing Hancock When Hancock dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it
2. When Hancock enters, Blasting Station triggers, untapping Blasting Station
3. Resolve the Blasting Station ability from step 1
4. Activate Blasting Station by tapping it and sacrificing Hancock When Hancock dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
5. Hancock enters and dies as a state-based action due to having 0 toughness
6. Its undying ability and Blasting Station trigger
7. Resolve the undying trigger, returning Hancock from your graveyard to the battlefield with a +1/+1 counter on it
8. When Hancock enters, Blasting Station triggers
9. Resolve both triggers from this step and step 7, untapping Blasting Station
10. Resolve the Blasting Station ability from step 5
11. Repeat from step 5

Results

• Infinite ETB
• Infinite LTB
• Infinite damage
• Infinite death triggers
• Infinite sacrifice triggers
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control