Steven Universe - Black Diamond summoning her weapon, a black hole

Long ago, in a distant galaxy,

I, Black Diamond, the shape-shifting fusion of all members of the Diamond Authority, unleashed an unspeakable evil upon the universe!

But, a foolish quartz warrior, wielding a sword that was not her own, stepped forth to oppose me.

show images of Rose Quartz fighting and shattering Pink Diamond

Before she could come after any others, White Diamond tore open a portal in space, and flung her onto the planet from which she was born.

Now the fool seeks to return to Homeworld, and undo the law that is the Diamonds.