I need a monster fix, quick (HARREKSAGA players don't open this)

From: hcarteau_at_7kcyMne1T-G0myH74i8Arnm5jfSJ_VWDZWK4KKzcMxYnHwi5q711M_YuD5sAmR6HFEK
Date: Sat, 16 Jun 2012 13:00:12 +0200 (CEST)

If you are one of my players, too late. Ygg's salty wind will flay the flesh off your lying, sorry bones. You car won't start and you won't be able to come to my place tomorrow to play.

Now to you esteemed gentlemen : I need an idea for an opponent / monster found on the wreck of a waertagi dragonship on the Edrelynn islands. It already looks like the "Nostromo", with grues in the holds and waertagi ghosts fluttering around, but I need a flyer which nests on the ship's bridge, and takes off from there to go look for food. I had fought about a chaotic wyrmspawn of the Mother of Monsters, but then why wouldn't it have eaten the whole neighboring waertagi colony already ?

Any ideas ?