Preston, the Vanisher + Delney, Streetwise Lookout + Sefris of the Hidden Ways + Altar of Dementia + Vicious Battlerager

Prerequisites

• You are able to complete a dungeon.

Steps

1. 1Complete a dungeon.
2. 2Sefris' second ability triggers twice due to Delney.
3. 3Resolve the first trigger, returning up to one other creature from your graveyard to the battlefield.
4. 4Resolve the second trigger, returning Vicious Battlerager from your graveyard onto the battlefield.
5. 5When Vicious Battlerager enters, it and Preston trigger twice due to Delney.
6. 6Holding priority, activate Altar of Dementia by sacrificing Vicious Battlerager.
7. 7Resolve a Preston trigger, creating a token copy of Vicious Battlerager that is a 0/1 Illusion.
8. 8When the Vicious Battlerager token enters, it triggers twice due to Delney.
9. 9Resolve the Vicious Battlerager token triggers, venturing into Undercity twice.
10. 10Resolve the second Preston trigger from step 5, creating a token copy of Vicious Battlerager that is a 0/1 Illusion.
11. 11Repeat steps 8 and 9 one additional time.
12. 12Resolve the first Vicious Battlerager trigger from step 5, venturing into Undercity and completing Undercity.
13. 13Repeat from step 2.

Effects

• Infinite +1/+1 counters on creatures you control
• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite artifact tokens
• Infinite card draw
• Infinite colored mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite creature tokens
• Infinite death triggers
• Infinite draw triggers
• Infinite mill
• Infinite self-mill
• 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