Zzzap bleeding energy

Zzzap shuddered in the sky. On a guess, he’d just used up about a quarter of his energy. Maybe more. He didn’t want to think about what that meant when he changed back to human form. It wasn’t like he had a lot of excess weight to burn.

Excerpt From Ex-Isle, pg 634
Peter Clines
https://books.apple.com/us/book/ex-isle/id989619017