Preston, the Vanisher + Delney, Streetwise Lookout + Sefris of the Hidden Ways + Yahenni, Undying Partisan + White Plume Adventurer

Preston, the Vanisher

Delney, Streetwise Lookout

Sefris of the Hidden Ways

Yahenni, Undying Partisan

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 Yahenni 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 engine kicks into motion once you have completed a dungeon, turning Sefris of the Hidden Ways into an absolute powerhouse of graveyard recursion. Delney, Streetwise Lookout acts as a vital multiplier here, doubling both Sefris's reanimation triggers and the entry triggers of small creatures, while Preston, the Vanisher capitalizes on those un-cast arrivals by spawning a steady stream of 0/1 Illusion token copies. As White Plume Adventurer repeatedly enters the battlefield to take the initiative and sprint through the Undercity, Yahenni, Undying Partisan stands ready to sacrifice it to keep the loop fluid, fueling an unstoppable cascade of dungeon completions that yields infinite resources across the board.