These are the sets that are legal in the Standard format:
Rampaging Ferocidon
Huatli, Dinosaur Knight
Silverclad Ferocidons
Storm the Vault|Vault of Catlacan
Gishath, Sun's Avatar
Huatli, Warrior Poet
Angrath, Minotaur Pirate
Angrath, the Flame-Chained
Zacama, Primal Calamity
Star of Extinction
Admiral Beckett Brass
Rowdy Crew
Rekindling Phoenix
Reckless Rage
Forerunner of the Empire
Brass's Bounty
Regisaur Alpha
Sunbird's Invocation
Angrath's Marauders
Burning Sun's Avatar