Xu-Ifit, Osteoharmonist, Intruder Alarm, and Blasting Station

Prerequisites

• Xu-Ifit, Osteoharmonist on the battlefield
• Intruder Alarm on the battlefield
• Blasting Station on the battlefield

Steps

1. Activate Xu-Ifit by tapping it, returning a creature card from your graveyard to the battlefield
2. When the creature enters the battlefield, Intruder Alarm and Blasting Station trigger, untapping all creatures and Blasting Station
3. Activate Blasting Station by tapping it and sacrificing the creature returned in step 1
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite damage
• Infinite mana creatures you control can produce
• Infinite untap of all creatures