Azdaha, Sealed Lord of Vishaps

Whenever Etali, Primal Storm attacks,
exile the top card of each player's
library, then you may cast any number
of spells from among those cards
without paying their mana costs.
———{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}
"An enormous dragon as ancient as the mountains themselves."