Apparently Queen Bah doesn't need to sleep and has a pretty impressive memory, she listens attentively to every word. There is a lot of knowledge that can be imparted.

There is. He does not know how politics is organised here but he will also go impart that knowledge on other Queens so this polity won't conquer the others. He informs Queen Bah of this.

She was already going to impart this with her allies, but Sadde can do it for the rest of the world, for sure. There are about three empires in the world - no empress, but hundreds of queens working together - and about seventeen other political unities of lesser importance (they have less than a dozen queens each). Here is an optimal path to reach the ones in this continent, and Queen Bah thinks this one is likely to share knowledge with these other two and there is that one in that one polar island that might just shoot him on sight.

He can, as he has demonstrated, be shot with anything that does not set him on fire. He has enough magic that even fire should not be a concern. He is okay with this.

Sadde's journey through the world is uneventful. They tell him more about this world's history, which fares better than Earth's.

The people from the polar island don't shoot him, instead dropping rocks on him, but are willing to listen once that proves futile. They don't share anything with the vampire, but bid him farewell.

That's alright, he doesn't need anything from them, he's just sharing technology and magic.

Eventually he runs out of good things to do in this to this world. Sadde stayed long enough that word got around and some of the advancements took place. A star is named after Sadde.

Their aura shines around them with a blue edge to it. There is something content about it, or rather... rested, healed, strong, hopeful.

But it tells Sadde and Crystal that it's time to go, and it pulls them upwards towards the stars.

So she starts flying up—

—but Crystal stays.

And the agony is strong enough that she comes crashing back down, whimpering. "Crystal—my Crystal—"

"You've been ignoring me," she says.

"—what? No, I—you're me, how could—"

"Listen for once in your life!"

She falls silent.

"You're running. You found a solution and you kept running. And now you're running towards them, all fine and good, yes. You've found a solution. What are you going to do? Did you think just helping this one world would be enough, you'd be able to move on after this?"

"—what? No! Of course not! I—I would never—"

"You chose it once! You chose to ignore it all, to stop looking, to look for them. You rationalised it, you told yourself you weren't functional enough to help—you could've done more."

"Do you think I don't know that? I know!"

"What changed? What are you going to do when it takes hundreds of years to see them? Ignore it all again, fall into desperation?"

"I—"

"You have thousands of years of advancements in your head, you know sorcery, you've infected every other world you've visited with it and you didn't spare that a second thought."

"I'm you. Listen to me. I miss them, too, I need them, you don't need to be yourself, you just need to be functional. You could have afforded an extra five minutes per world, you know that. Promise me."

"Promise me you'll help. You'll help everyone. You have to."