Talons Of Power: The Graphic Novel (Wings of Fire, Book Nine)

For every villain, there is a hero ...
Turtle isn't one of the heroes he reads about in stories. If he were, he'd use his animus powers to help Pyrrhia - instead of keeping his abilities a secret, even from his own sister. Now that Darkstalker, the sinister and impossibly old dragon from Pyrrhia's most notorious legends, has returned, Turtle knows his own role is simple: hide. And stay hidden. The more he watches Darkstalker from the shadows, the more Turtle knows that someone needs to stop the powerful dragon. A real hero. But Turtle is running out of time to find one, which means ... he might have to try to save the day himself.