World Shaper + Glacial Chasm + Mortuary Mire + Yahenni, Undying Partisan

World Shaper

Glacial Chasm

Mortuary Mire

Yahenni, Undying Partisan

How it works

1. While Glacial Chasm is on the battlefield, all damage that would be dealt to you is prevented.
2. At the beginning of your upkeep, Glacial Chasm triggers. Choose not to pay its cumulative upkeep cost and sacrifice it.
3. Activate Yahenni by sacrificing World Shaper.
4. When World Shaper dies, its second ability triggers, returning Glacial Chasm and Mortuary Mire from your graveyard to the battlefield tapped.
5. When Glacial Chasm and Mortuary Mire enter, they each trigger.
6. Resolve the Glacial Chasm trigger, sacrificing Mortuary Mire.
7. Resolve the Mortuary Mire trigger, putting World Shaper from your graveyard onto the top of your library.
8. Resolve the Yahenni ability from step 3.
9. Move to your next turn, drawing World Shaper during your draw step.
10. At the beginning of your upkeep, Glacial Chasm triggers. Choose not to pay its cumulative upkeep cost and sacrifice it.
11. Cast World Shaper by paying 3.
12. Repeat from step 3.