[Kadi]

Spoiler for Gwen's powers:

She's no goddess but a divine ancestor, an immortal super-witch. She zoom around at super speeds (high level Flight magic; I think even Alec doesn't try catching her/can't keep up), summon divine beasts (kraken, dragon) and turn into a dragon herself for a while. Apart from that her magic overall is stronger than any human witch's. A lot stronger.