Ketramose, the New Dawn, Toluz, Clever Conductor, Horizon Chimera, and Witch-king of Angmar

Prerequisites

• Ketramose, the New Dawn on the battlefield
• Toluz, Clever Conductor on the battlefield
• Horizon Chimera on the battlefield
• Witch-king of Angmar on the battlefield

Steps

1. Activate Witch-king of Angmar by discarding a card
2. Toluz's second ability triggers, exiling the discarded card from your graveyard
3. Ketramose triggers, causing you to draw a card and lose 1 life
4. Horizon Chimera triggers, causing you to gain 1 life
5. Resolve the Witch-king of Angmar ability
6. Repeat

Results

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