Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Blasting Station, and Spiteful Squad

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Blasting Station on the battlefield
• Spiteful Squad on the battlefield

Steps

1. Activate Blasting Station by tapping it and sacrificing Spiteful Squad
2. When Spiteful Squad dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to its replacement effect
3. When Spiteful Squad enters, Blasting Station triggers, untapping Blasting Station
4. Resolve the Blasting Station ability from step 1
5. Repeat

Results

• Infinite +1/+1 counters on creatures you control
• Infinite ETB
• Infinite LTB
• Infinite damage
• Infinite death triggers
• Infinite recursion of creatures you control
• Infinite sacrifice triggers