Casey & Raph, Hotheads, Mortuary, and Altar of Dementia

Prerequisites

• Casey & Raph, Hotheads in hand
• Mortuary on the battlefield
• Altar of Dementia on the battlefield
• available

Steps

1. Cast Casey & Raph by paying
2. When Casey & Raph enters, it triggers
3. Choose its first mode targeting yourself
4. Holding priority, activate Altar of Dementia by sacrificing Casey & Raph
5. When Casey & Raph dies, Mortuary triggers, putting Casey & Raph onto the top of your library from your graveyard
6. Resolve the Altar of Dementia ability
7. Resolve the Casey & Raph trigger from step 2, causing you to exile Casey & Raph from the top of your ability with the ability to cast it from exile without paying its mana cost
8. Cast Casey & Raph from exile without paying its mana cost
9. Repeat from step 2

Results

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