Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Blasting Station, and Cayth, Famed Mechanist

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Blasting Station on the battlefield
• Cayth, Famed Mechanist on the battlefield

Steps

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

Results

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