Orah, Skyclave Hierophant + Sister Hospitaller + Ancestor's Chosen + Altar of Dementia

Prerequisites

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Steps

1. 1Activate Altar of Dementia by sacrificing Ancestor's Chosen.
2. 2When Ancestor's Chosen dies, Orah triggers, returning Sister Hospitaller from your graveyard to the battlefield.
3. 3When Sister Hospitaller enters, it triggers, returning Ancestor's Chosen from your graveyard to the battlefield and causing you to gain 7 life.
4. 4When Ancestor's Chosen enters, it triggers, causing you to gain 1 life for each card in your graveyard.
5. 5Resolve the Altar of Dementia ability.
6. 6Activate Altar of Dementia by sacrificing Sister Hospitaller.
7. 7When Sister Hospitaller dies, Orah triggers, allowing you to return a Cleric with mana value 5 or less from your graveyard to the battlefield.
8. 8Resolve the Altar of Dementia ability.
9. 9Repeat.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite lifegain
• Infinite lifegain triggers
• Infinite mill
• Infinite recursion of some creature cards in your graveyard
• Infinite self-mill