Obsidian shakes her head, and says, "I've looked a lot, but there aren't any," she says.

But!
She met other dragons earlier, right?

That's totally different.
Saying that a silver dragon and a gold dragon and a black dragon are the same is like saying an orc and a shiny elf and a mermaid are the same.
Or saying a housecat and a lion and a panther are the same.
Or saying that sandstone and ruby and obsidian are the same.
Or...
anything else along those lines.
Totally different!
Anyone who says otherwise is weird.

Obsidian kicks her legs.
"I know about GLoG, but what's Vigil?" she asks. "Sounds like some kind of cult."