Mikaeus, the Unhallowed, Blasting Station, and Dream Seizer

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Blasting Station on the battlefield
• Dream Seizer on the battlefield

Steps

1. Activate Blasting Station by tapping it and sacrificing Dream Seizer
2. When Dream Seizer dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it
3. When Dream Seizer enters the battlefield, it and Blasting Station trigger
4. Resolve the Dream Seizer 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 ETB
• Infinite LTB
• Infinite damage
• Infinite death triggers
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite untap of creatures you control