He was interrupted by a terrible noise, half way between the trumpeting of a herd of elephants and the roar of thunder. He pushed himself up.
“Weave us a castle,” he ordered. “Make it impenetrable to the worst of predators. I'll go see what we're looking at.”
When he got outside, the day was darker than he remembered, and the sight that met his eyes was worse than he imagined. The creature was galloping towards him, across the valley to his left. It was enormous, an indescribable hybrid of the worst variety, full of parts of animals he didn't recognise, fused together with sinews of fire and muscles of metal. He stood frozen in front of their suddenly puny shelter, oblivious to the branches and vines that were snaking out and grounding themselves firmly behind him.
This wasn't a character from the stories. This was far worse than that, and he could think of no power in the Circle to defeat it.