Saffi Eriksdotter, Mistmoon Griffin, and Altar of Dementia

Prerequisites

• Saffi Eriksdotter on the battlefield
• Mistmoon Griffin on the battlefield
• Altar of Dementia on the battlefield
• undefined

Steps

1. Activate Saffi by sacrificing it, targeting Mistmoon Griffin
2. Activate Altar of Dementia by sacrificing Mistmoon Griffin
3. When Mistmoon Griffin dies, it and Saffi trigger
4. Resolve the Saffi trigger, returning Mistmoon Griffin from your graveyard to the battlefield
5. Resolve the Mistmoon Griffin trigger, failing to exile it as it is not in your graveyard and then returning Saffi from your graveyard to the battlefield
6. Resolve the Altar of Dementia ability
7. Repeat

Results

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