Bloodboil Sorcerer + Delney, Streetwise Lookout + Preston, the Vanisher + and 2 others

WUBR identity

Commander legal

The 5 combo pieces

• Bloodboil Sorcerer
• Delney, Streetwise Lookout
• Preston, the Vanisher
• Sefris of the Hidden Ways
• Umbral Collar Zealot

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 Bloodboil Sorcerer from your graveyard onto the battlefield.
5. When Bloodboil Sorcerer enters, it triggers once and Preston triggers twice due to Delney.
6. Holding priority, activate Umbral Collar Zealot by sacrificing Bloodboil Sorcerer.
7. Resolve a Preston trigger, creating a token copy of Bloodboil Sorcerer that is a 0/1 Illusion.
8. When the Bloodboil Sorcerer token enters, it triggers twice due to Delney.
9. Resolve the Bloodboil Sorcerer token triggers, venturing into Undercity twice.
10. Resolve the second Preston trigger from step 5, creating a token copy of Bloodboil Sorcerer that is a 0/1 Illusion.
11. Repeat steps 8 and 9 one additional time.
12. Resolve the Bloodboil Sorcerer 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 card draw
• Infinite colored mana
• Infinite creature LTB
• Infinite creature tokens
• Infinite death triggers
• Infinite draw triggers
• Infinite ETB
• Infinite sacrifice triggers
• Infinite surveil
• 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