Requires

Etali, Primal Conqueror // Etali, Primal Sickness must be in hand, or in the command zone. Hua Tuo, Honored Physician must be on the battlefield. Thornbite Staff must be on the battlefield. Phyrexian Altar must be on the battlefield. It is your precombat main phase. Hua Tuo does not have summoning sickness. Thornbite Staff attached to Hua Tuo. Mana needed: plus enough mana to pay for commander tax, if applicable

Steps

1. Cast Etali from your hand or from the command zone by paying plus commander tax, if applicable.
2. When Etali enters the battlefield, it triggers.
3. Holding priority, activate Phyrexian Altar by sacrificing Etali, adding one mana of any color.
4. If Etali is your commander, choose not to return it to the command zone from your graveyard.
5. When Etali dies, Hua Tuo triggers, untapping Hua Tuo.
6. Activate Hua Tuo by tapping it, putting Etali on top of your library from your graveyard.
7. Resolve the Etali trigger from step 2, causing you to exile cards from each player's library until you exile a nonland card, with you exiling Etali from your library, and cast Etali and any other nonland cards exiled this way without paying their mana costs.
8. Repeat from step 2.

Results