Preston, the Vanisher + Delney, Streetwise Lookout + Sefris of the Hidden Ways + Thermopod + Feywild Caretaker

Preston, the Vanisher

Delney, Streetwise Lookout

Sefris of the Hidden Ways

Thermopod

Feywild Caretaker

How it works

1. Complete a dungeon.
2. Sefris' second ability triggers twice due to Delney.
3. Resolve the first trigger, returning up to one other creature from your graveyard to the battlefield.
4. Resolve the second trigger, returning Feywild Caretaker from your graveyard onto the battlefield.
5. When Feywild Caretaker enters, it triggers once and Preston triggers twice due to Delney.
6. Holding priority, activate Thermopod by sacrificing Feywild Caretaker.
7. Resolve a Preston trigger, creating a token copy of Feywild Caretaker that is a 0/1 Illusion.
8. When the Feywild Caretaker token enters, it triggers twice due to Delney.
9. Resolve the Feywild Caretaker token triggers, venturing into Undercity twice.
10. Resolve the second Preston trigger from step 5, creating a token copy of Feywild Caretaker that is a 0/1 Illusion.
11. Repeat steps 8 and 9 one additional time.
12. Resolve the Feywild Caretaker trigger from step 5, venturing into Undercity and completing Undercity.
13. Repeat from step 2.

This intricate loop hinges on doubling up creature triggers while constantly recycling resources from your graveyard. With Sefris of the Hidden Ways ready to bring back creatures when a dungeon is completed, Delney, Streetwise Lookout steps in to double those triggers, letting you return both Feywild Caretaker and another creature at the same time. As Feywild Caretaker enters the battlefield, Preston, the Vanisher creates a flurry of 0/1 Illusion copies whose own entry triggers rapidly advance you through the Undercity. Meanwhile, Thermopod converts your creatures into the red mana needed to keep the cycle going, allowing you to breeze through dungeons infinitely and trigger endless cascading advantages.