What if?
What if Steven lost control of his powers to the point of going insane.
Part 1:
(New series, inspired by the Disney+ series, which is about different timelines of the MCU. Here, I'm going to be the Watcher.)
The story starts from the moment Steven shatters Jasper, but something is different from what originally happened, the boy doesn't regain consciousness and runs to temple to try to fix his mistake. His power has corrupted his mind, Steven starts laughing maniacally and his gem starts to glow to the point of covering his entire body.
His gem has changed position, returning to the original pink diamond shape. Steven underwent the same transformation as Spinel, when he discovered the cruelty that Pink Diamond had committed against her. But now we are not dealing with a simple “crazy” Spinel, but with one of the most powerful beings in the universe, a being that can use its powers in organic life form, as well as in gems.