Teysa, Orzhov Scion, Painter's Servant, and Altar of Dementia

Prerequisites

• Teysa, Orzhov Scion on the battlefield
• Painter's Servant on the battlefield
• Altar of Dementia on the battlefield
• "Black" chosen with Painter's Servant
• You control at least one additional creature

Steps

1. Activate Altar of Dementia by sacrificing any other creature
2. Because the creature was black due to Painter's Servant, Teysa triggers, creating a 1/1 Spirit creature token
3. Resolve the Altar of Dementia ability, causing target player to mill cards equal to the sacrificed creature's power
4. Repeat

Results

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