Preston, the Vanisher + Delney, Streetwise Lookout + Sefris of the Hidden Ways + Yahenni, Undying Partisan + Caves of Chaos Adventurer
Preston, the Vanisher
Delney, Streetwise Lookout
Sefris of the Hidden Ways
Yahenni, Undying Partisan
Caves of Chaos Adventurer
Infinite artifact ETBInfinite artifact LTBInfinite artifact sacrifice triggersInfinite artifact tokensInfinite +1/+1 counters on creatures you controlInfinite creature ETBInfinite creature LTBInfinite Treasure tokensInfinite card drawInfinite colored manaInfinite creature tokensInfinite death triggersInfinite draw triggersInfinite creature sacrifice triggersNear-infinite lifelossPut all basic lands from your library into your handPut all creature cards from your library onto the battlefieldReturn most creature cards from your graveyard onto the battlefield
How it works
Complete a dungeon.
Sefris' second ability triggers twice due to Delney.
Resolve the first trigger, returning up to one other creature from your graveyard to the battlefield.
Resolve the second trigger, returning Caves of Chaos Adventurer from your graveyard onto the battlefield.
When Caves of Chaos Adventurer enters, it triggers once and Preston triggers twice due to Delney.
Holding priority, activate Yahenni by sacrificing Caves of Chaos Adventurer.
Resolve a Preston trigger, creating a token copy of Caves of Chaos Adventurer that is a 0/1 Illusion.
When the Caves of Chaos Adventurer token enters, it triggers twice due to Delney.
Resolve the Caves of Chaos Adventurer token triggers, venturing into Undercity twice.
Resolve the second Preston trigger from step 5, creating a token copy of Caves of Chaos Adventurer that is a 0/1 Illusion.
Repeat steps 8 and 9 one additional time.
Resolve the Caves of Chaos Adventurer trigger from step 5, venturing into Undercity and completing Undercity.
Repeat from step 2.
This engine hinges on a clever loop of recursive dungeon delving, supercharged by Delney, Streetwise Lookout doubling all of your low-power creature triggers. Once you have completed a dungeon, Sefris of the Hidden Ways can be triggered to return creatures—including Caves of Chaos Adventurer—straight to the battlefield, immediately taking the initiative and feeding more triggers into Preston, the Vanisher. By using Yahenni, Undying Partisan as a reliable outlet to sacrifice the looping creature, you protect your board while continuously generating copies of Caves of Chaos Adventurer to tear through the Undercity over and over again.