Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Blasting Station, and White Widow, Free Agent

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Blasting Station on the battlefield
• White Widow, Free Agent on the battlefield

Steps

1. Activate Blasting Station by tapping it and sacrificing White Widow
2. When White Widow dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. When White Widow enters, it and Blasting Station trigger
4. Resolve the White Widow trigger, putting a +1/+1 counter on it and up to one other creature
5. Resolve the Blasting Station trigger, untapping it
6. Resolve the Blasting Station ability from step 1
7. Repeat

Results

• Infinite +1/+1 counters on creatures you control
• 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