Preston, the Vanisher + Delney, Streetwise Lookout + Sefris of the Hidden Ways + Bartolomé del Presidio + White Plume Adventurer

Preston, the Vanisher

Delney, Streetwise Lookout

Sefris of the Hidden Ways

Bartolomé del Presidio

White Plume Adventurer

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 White Plume Adventurer from your graveyard onto the battlefield.
5. When White Plume Adventurer enters, it triggers once and Preston triggers twice due to Delney.
6. Holding priority, activate Bartolomé del Presidio by sacrificing White Plume Adventurer.
7. Resolve a Preston trigger, creating a token copy of White Plume Adventurer that is a 0/1 Illusion.
8. When the White Plume Adventurer token enters, it triggers twice due to Delney.
9. Resolve the White Plume Adventurer token triggers, venturing into Undercity twice.
10. Resolve the second Preston trigger from step 5, creating a token copy of White Plume Adventurer that is a 0/1 Illusion.
11. Repeat steps 8 and 9 one additional time.
12. Resolve the White Plume Adventurer trigger from step 5, venturing into Undercity and completing Undercity.
13. Repeat from step 2.

This intricate loop turns the dungeon-delving engine into an infinite value machine by leveraging Delney, Streetwise Lookout to supercharge Sefris of the Hidden Ways and Preston, the Vanisher. When Sefris brings back White Plume Adventurer from your graveyard, Delney doubles both Sefris's dungeon completion triggers and the resulting creature ETBs. Meanwhile, Preston creates 0/1 Illusion copies of the Adventurer that repeatedly take the initiative, allowing you to rocket through the Undercity dungeon while Bartolomé del Presidio stands ready to sacrifice the real Adventurer to keep the loop fluid.