Feast of Sanity, and Flumph

Prerequisites

• Feast of Sanity on the battlefield
• Flumph on the battlefield

Steps

1. Proceed to your cleanup step, causing you to discard down to your maximum hand size and remove all damage from all permanents
2. Feast of Sanity triggers for each card discarded this way
3. Resolve the first trigger, dealing 1 damage to Flumph and causing you to gain one life
4. Flumph triggers, causing you and an opponent to draw a card
5. Repeat from step 3 as necessary for each remaining trigger
6. Once all triggers have been resolved, and all players pass priority, another cleanup step will occur, causing you to discard down to your maximum hand size and remove all damage from all permanents
7. Repeat from step 2

Results

• Infinite draw triggers
• Infinite looting
• Infinite self-discard triggers
• Near-infinite lifegain
• Near-infinite lifegain triggers
• Near-infinite card draw for each opponent
• Near-infinite draw triggers for each opponent