Reposting and slightly editing from a Steven Multiverse threads
>The Gems arrive to colonize Thra
>The Skesis are already in power, recognize the gems as another space-fairing race from the time of Urskeks
>Decide to stay the fuck out of that business, they have the crystal, and the Skeksis are eternal, they're sure they'll survive
>Fast-forward, the rebellion begins
>The beta kindergarten is installed
>This over-draining of life energy kickstarts a localized darkening
>Gems begin coming out of the ground already corrupted, homeworld losing ground faster as they can't produce new troops
>Skeksis see opportunity
>Side with the crystal gems, unite the Gelfling to fight with them
>Final push is made, but the diamonds are refusing to abandon Pink on Thra
>Pink's "Shattering" happens
>Things progress as usual, but now the Skeksis are seen as allies of the Crystal Gems, and heroes to Thra for driving off the invaders
>Also there's a corrupted Jasper and some of the famethysts running around making trouble for Thra
>Fast-forward to modern day
>Amethyst was born, but instead of just being short, she is partially corrupted. Somewhat like when Steven healed Nephrite's for the first time
>The crystal stopped giving long ago due to the damage from the colony, but the Skeksis have found an alternate source of youth
>Skektek has been draining gems and gem shards for energy for years
>The Skeksis request the crystal gems' help during the Arathim wars
>Agree out of a sense of obligation after help with the homeworld rebellion
>While there, Rose meets with Ordon, is charmed by his determination and bravery, they hooks up instead of Shoni
>Rose begins to doubt the motivations of the Skeksis, but already had an encounter with Ordon's "Spitter Splitter"
>Stevian is born, the tapestry for him is left inside of Rose's Fizzgig
>Skeksis are starting to run low on gem shards to drain for continued youth
>Skeksis need more life energy somehow
>Begin Age of Resistance