Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Blasting Station, and Iron League Steed

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Blasting Station on the battlefield
• Iron League Steed on the battlefield

Steps

1. Activate Blasting Station by tapping it and sacrificing Iron League Steed
2. When Iron League Steed dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. When Iron League Steed enters, its fabricate ability and Blasting Station trigger
4. Resolve the Iron League Steed 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