Grenzo, Dungeon Warden, Soldevi Digger, Su-Chi Cave Guard, and Altar of Dementia

Prerequisites

• Grenzo, Dungeon Warden on the battlefield
• Soldevi Digger on the battlefield
• Su-Chi Cave Guard on the battlefield
• Altar of Dementia on the battlefield
• Grenzo has a power of eight or greater

Steps

1. Activate Altar of Dementia by sacrificing Su-Chi Cave Guard
2. When Su-Chi Cave Guard dies, it triggers, adding eight
3. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Su-Chi Cave Guard's power
4. Activate Soldevi Digger by paying , putting Su-Chi Cave Guard on the bottom of your library from your graveyard
5. Activate Grenzo by paying , putting Su-Chi Cave Guard into your graveyard from the bottom of your library, and then putting it onto the battlefield
6. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill