({7} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) plus enough mana to pay for commander tax, if applicable available.
Steps
Cast
Etali either from your hand or from the command zone by paying ({5} magic symbol) ({R} magic symbol) ({R} magic symbol) plus commander tax, if applicable.
When
Etali enters the battlefield, it triggers.
Holding priority, activate
Mirage Mirror by paying ({2} magic symbol) , choosing to have it become a copy of
Etali.
Choose to put
Etali into your graveyard due to the legend rule.
If
Etali is your commander, choose not to return it to the command zone from your graveyard.
Hua Tuo triggers, untapping itself.
Activate
Hua Tuo by tapping it, putting
Etali on top of your library from your graveyard.
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.
Choose to put
Etali into your graveyard due to the legend rule.
If
Etali is your commander, choose not to return it to the command zone from your graveyard.
Etali enters-the-battlefield ability and
Hua Tuo trigger.
Resolve the
Hua Tuo trigger, untapping it.
Repeat from step 7.
Results
Cast all nonland cards from each opponent's library.