Basri's Lieutenant, Grumgully, the Generous, and Altar of Dementia

Prerequisites

• Basri's Lieutenant on the battlefield
• Grumgully, the Generous on the battlefield
• Altar of Dementia on the battlefield
• You control at least one additional creature with at least one +1/+1 counter

Steps

1. Activate Altar of Dementia by sacrificing a creature with at least one +1/+1 counter
2. Basri's Lieutenant trigger, creating a 2/2 Knight token
3. When Knight token enters the battlefield, Grumgully triggers, putting a +1/+1 counter on Knight token
4. Resolve the Altar of Dementia ability, causing target player to mill cards equal to the sacrificed creature's power
5. Repeat

Results

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