Jabberwock

The Jabberwock is a curious sort of Dragon that roams the Feywild domain of Prismeer. It was apparently befriended by the realm's ruler, the Arch-Fey Zybilna. With Zybilna imprisoned by the Hourglass Coven, the Jabberwock seems to be wandering freely, roosting in the Palace of Heart's Desire and hunting in the forests of Thither. Although the Witchlight Court did not initially see it, they've seen traces of something huge leaving a swath of destruction through the forest, and they've heard tales of whooshing wings, eyes of flame, and a horrible burbling noise. The fact that the Hags of the Hourglass Coven fear it gave them definite pause. And when they finally saw it swooping down to the Palace, they understood why. 
They eventually found it curled around Iggwilv's Cauldron and Zybilna herself. When they freed the Wizard Ringlerun from the time-stopping magic, his spell, cast in the moments before he was frozen, erupted out, harming the Jabberwock and waking it. The group fled the Jabberwock trough the Palace, as it smashed through walls to get at them. Only the release of the massive owl Bloodybeak saved them from its desire to devour them. The owl drove the dragon off, though it survived the encounter.