Preston, the Vanisher + Delney, Streetwise Lookout + Sefris of the Hidden Ways + Bartolomé del Presidio + Stirring Bard

Preston, the Vanisher

Delney, Streetwise Lookout

Sefris of the Hidden Ways

Bartolomé del Presidio

Stirring Bard

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

This clever loop turns Sefris of the Hidden Ways into an endless dungeon-delving engine by leveraging Delney, Streetwise Lookout to double every crucial trigger for creatures with power 2 or less. When Sefris brings back Stirring Bard, its entry and Preston, the Vanisher's copy effect both trigger twice, allowing Bartolomé del Presidio to cleanly sacrifice the original Bard to keep the graveyard primed. Meanwhile, the resulting 0/1 Illusion tokens created by Preston copy Stirring Bard's entry ability to repeatedly seize the initiative, rocketing you through the Undercity dungeon to infinite dungeon completions.