Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Blasting Station, and Old-Growth Educator

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Blasting Station on the battlefield
• Old-Growth Educator on the battlefield

Steps

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

Results

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