Ketramose, the New Dawn, Necropotence, Feast of Sanity, and Witch-king of Angmar

Prerequisites

• Ketramose, the New Dawn on the battlefield
• Necropotence on the battlefield
• Feast of Sanity on the battlefield
• Witch-king of Angmar on the battlefield

Steps

1. Activate Witch-king of Angmar by discarding a card
2. Necropotence and Feast of Sanity trigger
3. Resolve the Feast of Sanity trigger, dealing 1 damage to any target and causing you to gain 1 life
4. Resolve the Necropotence trigger, exiling the discarded card from your graveyard
5. Ketramose triggers, causing you to draw a card and lose 1 life
6. Resolve the Witch-king of Angmar ability
7. Repeat

Results

• Near-infinite damage
• Infinite self-discard triggers
• Near-infinite lifegain triggers
• Infinite draw triggers
• Exile your library
• Infinite rummaging