World Shaper + Glacial Chasm + Mortuary Mire + Woe Strider

World Shaper

Glacial Chasm

Mortuary Mire

Woe Strider

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 Woe Strider 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 Woe Strider 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.

This clever loop locks your opponents out of ever dealing damage to you by continuously recycling Glacial Chasm through your graveyard. Woe Strider acts as the sacrifice outlet that sends World Shaper to the graveyard, which in turn triggers World Shaper's death ability to return both Glacial Chasm and Mortuary Mire to the battlefield. Mortuary Mire then lets you put World Shaper right back on top of your library so you can recast it on your turn, while Glacial Chasm's entry triggers allow you to safely sacrifice the Mire to keep the Chasm around—all while its static damage-prevention ability keeps you completely safe.