A sharp whistle from Anna catches Derek's attention temporarily, before he's distracted by a slightly louder sound:
WHAM
A small shockwave emanates from right behind Derek, causing his grip to slacken temporarily. Another sharp whistle from Annastrianna sees a blurred tail whip around to smack away Derek's arms, clipping his head on the way by. Another whistle, another whipped tail, and his legs gave out from under him. Where the tall, imposing Derek had stood apparently hid the smaller, lithe form of a draconic creature about the size of a mountain lion stood, it's scales a pale albino color...and some of them rotting. It's eyes had severe cataracts, but it didn't seem to impede the creature's ability to detect beings and fight them.
"Thank you, Megara, I'm sure he won't be any trouble now. For now, might be best to get back to your nest on the library roof; wouldn't want anybody getting suspicious." As the undead abomination flew off, Annastrianna made her way over to Faye and gave her a hand up. "Are you alright, Miss Faye? Megara didn't clip you by accident, did she? She's got a nasty habit of overexcitement..."