Ketramose, the New Dawn, Toluz, Clever Conductor, and Shabraz, the Skyshark

Prerequisites

• Ketramose, the New Dawn on the battlefield
• Toluz, Clever Conductor on the battlefield
• Shabraz, the Skyshark on the battlefield

Steps

1. Move to your cleanup step, causing you to discard cards down to your maximum hand size
2. Toluz's second ability triggers for each card discarded
3. Resolve the first trigger, exiling the discarded card from your graveyard
4. Ketramose triggers, causing you to draw a card and lose 1 life
5. Shabraz triggers, causing you to gain 1 life and putting a +1/+1 counter on Shabraz
6. Repeat from step 2 if needed for each remaining trigger
7. Discard down to your maximum hand size again, as you are still in your cleanup step
8. Repeat

Results

• Infinite self-discard triggers
• Near-infinite lifegain triggers
• Infinite draw triggers
• Exile your library
• Infinite rummaging
• Near-infinite +1/+1 counters on Shabraz