15 cards where the set is “rix” and the rarity is equal to mythic

Angrath, Minotaur Pirate (Rivals of Ixalan #201)
Angrath, the Flame-Chained (Rivals of Ixalan #152)
Azor's Gateway // Sanctum of the Sun (Rivals of Ixalan #176)
Azor's Gateway // Sanctum of the Sun (Rivals of Ixalan #176)
Azor, the Lawbringer (Rivals of Ixalan #154)
Elenda, the Dusk Rose (Rivals of Ixalan #157)
Huatli, Radiant Champion (Rivals of Ixalan #159)
Kumena, Tyrant of Orazca (Rivals of Ixalan #162)
Polyraptor (Rivals of Ixalan #144)
Rekindling Phoenix (Rivals of Ixalan #111)
The Immortal Sun (Rivals of Ixalan #180)
Timestream Navigator (Rivals of Ixalan #59)
Trapjaw Tyrant (Rivals of Ixalan #29)
Twilight Prophet (Rivals of Ixalan #88)
Vraska, Scheming Gorgon (Rivals of Ixalan #197)
Zacama, Primal Calamity (Rivals of Ixalan #174)

The message was clear to Sorin—time to search for something else.