Sister Hospitaller, Blasting Station, and Mardu Siegebreaker

Prerequisites

• Sister Hospitaller in hand
• Blasting Station on the battlefield
• Mardu Siegebreaker in the graveyard
• available

Steps

1. Cast Sister Hospitaller by paying
2. When Sister Hospitaller enters, it and Blasting Station trigger
3. Resolve the Blasting Station trigger, untapping it
4. Resolve the Sister Hospitaller trigger, returning Mardu Siegebreaker from your graveyard to the battlefield and causing you to gain life equal to its mana value
5. When Mardu Siegebreaker enters, it and Blasting Station trigger
6. Resolve the Blasting Station trigger, untapping it
7. Resolve the Mardu Siegebreaker trigger, exiling Sister Hospitaller until Mardu Siegebreaker leaves the battlefield
8. Activate Blasting Station by tapping it and sacrificing Mardu Siegebreaker
9. When Mardu Siegebreaker leaves the battlefield, Sister Hospitaller is returned from exile to the battlefield
10. Repeat from step 2
11. Resolve all Blasting Station abilities

Results

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