Su-Chi, Oathkeeper, Takeno's Daisho, Maskwood Nexus, and Altar of Dementia

Prerequisites

• Su-Chi on the battlefield
• Oathkeeper, Takeno's Daisho on the battlefield
• Maskwood Nexus on the battlefield
• Altar of Dementia on the battlefield
• Oathkeeper attached to Su-Chi

Steps

1. Activate Altar of Dementia by sacrificing Su-Chi
2. Su-Chi and Oathkeeper triggers
3. Resolve the Su-Chi trigger, adding
4. Resolve the Oathkeeper trigger, returning Su-Chi to the battlefield
5. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Su-Chi's power
6. Equip Oathkeeper to Su-Chi by paying
7. Repeat

Results

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