Jinnie Fay, Jetmir's Second, Black Market Tycoon, Thornbite Staff, and Altar of Dementia

Prerequisites

• Jinnie Fay, Jetmir's Second on the battlefield
• Black Market Tycoon on the battlefield
• Thornbite Staff on the battlefield
• Altar of Dementia on the battlefield
• Thornbite Staff attached to Black Market Tycoon
• Black Market Tycoon does not have summoning sickness

Steps

1. Activate Black Market Tycoon by tapping it, creating either a 2/2 Cat or a 3/1 Dog creature token
2. Activate Altar of Dementia by sacrificing the Cat or Dog
3. The Cat or Dog dies, triggering Black Market Tycoon, untapping Black Market Tycoon
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
• Infinite self-mill