User blog:JBox2D/Miranda the Dark Emissary

The ultimate is supposed to be her main damage source, which is why it has a low cooldown. It’s like anivia but you’re punished more when you decide to turn it off or have it interrupted. The damage is substantially higher than anivia’s ult because it is a hard channel, and she can’t do anything else whilst channeling it.

No, her ultimate is not based on Vel’Koz, it’s based on the master level Thunder spell from skyrim.