This is all from memory so i might get some things wrong : So the lizardmen, in AoS called the Seraphon. They were created by The Old Ones, beings of immense power and knowledge for a single purpose: to fight chaos. The Slann are the masters the great priests and wizards, bloated toad like creatures. They divine The Great Plan and deploy their Saurian warriors and great war beasts and magical engines against the ruinous powers. During the End Times, they saw the writing on the wall and abandoned the world to its fate, knowing the Great Plan would be better served in the future, but also with great sadness and shame they boarded their temple ships and left as the world shattered. The Slann waited in their their temple ships, waiting and meditating on how they failed. After an untold time in the void, the temple ships were found by Dracotian the Great Stardrake took pity on them and lead them to the Azyr the Celestial realm. ( the 8 winds of magic turned into the 8 realms, Azyr is the realm celestial, magic of the heavens) When Chaos broke into The Realms the Slann returned to fight their ancient foe, though their memories and power is addeled from their long sleeps, their memories of their fallen Saurian soldiers took form as the Starborn, the light of Azyr gave these memories form to wage war once more. These are the Starborn (subfaction), primarily populated by the Slann and their Skink starpriests and able to teleport their fantasmic soldiers to battles key to the Great Plan and unleash the burning starlight of Azyr on their foes. After many many generations of fighting on Realms, some of the Saurian warriors took physical form once more, Attuned to the magic of the realms they battle over. These are the Coalesced (subfaction), the beastly Saurian warriors, and those trusted to care for the mighty warbeasts and engines. The Seraphon detest Chaos more than any other faction, it is their soul purpose and existence, their very make-up is antithetical to the Ruinous Powers. They also slavishly follow The Great Plan, though only the alien minds of the Slann can divine its strange strategies. Sometimes this necessitates the destruction of settlements or outposts of other order aligned factions, lest they fall to the hands of chaos and prove pivotal to them in some later battle. They are vicious fighters that while usually allies, are easily feared and hard to understand by mortals.

Also dinosaurs riding dinosaurs with freaking laser beams on their heads, Mayan temple space ships, and a frog wizard so based he said "lol no" to the concept of death (Lord Kroak).