After steven while playing around with connie and "Rose's Sword" ending in it piercing a bubbled "gem" which looked like a big fragment of a gem horn as it'd then glow white and stop which Connie and Steven would just nervously walk away until they'd hear the sound of a ear deafening sound of some beam as with the gems Connie and Steven would run over to the town beach city and see destruction and people running everywhere as they'd see mayor dewey with a loudspeaker shouting at something

Mayor Dewey: PLEASE STOP THESE ACTIONS IMEDIATELY ROCK PERSON!

suddenly mayor dewey would get ingulfed suddenly by a blinding white beam which would destroy buildings engulfed by the beam as after it'd show mayor dewey with his clothes torn and still alive and untouched as he'd then just run for it leaving the crystal gems, Connie and Steven who was holding the bubbled fragment of the black gem to look at the figure who fired it the figure being a gem like pearl, amethyst and garnet as Connie and Steven would see this gem as a casual corrupt gem threat that just needed to be bubbled as the crystal gems would look at it with pure terror pearl saying

Pearl: it's... oh god-

Garnet: A mass production White diamond soldier...

Amethyst: and here one is... and it doesn't look like it's happy.