Delney, Streetwise Lookout + Passageway Seer + Preston, the Vanisher + and 2 others

WUB identity

Commander legal

The 5 combo pieces

• Delney, Streetwise Lookout
• Passageway Seer
• Preston, the Vanisher
• Sefris of the Hidden Ways
• Shilgengar, Sire of Famine

What must be in place

You are able to complete a dungeon.

How to execute it

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

What the combo produces

• Infinite +1/+1 counters on creatures you control
• Infinite Blood tokens
• Infinite card draw
• Infinite colored mana
• Infinite creature LTB
• Infinite creature tokens
• Infinite death triggers
• Infinite draw triggers
• Infinite ETB
• Infinite rummaging
• Infinite sacrifice triggers
• Infinite self-discard triggers
• Infinite Treasure tokens
• Near-infinite lifeloss
• Put all basic lands from your library into your hand
• Put all creature cards from your library onto the battlefield
• Return most creature cards from your graveyard onto the battlefield