Here be the Warp Dragons!

Warp Dragons are a very old, very powerful race of Dragons. Their powers seem to bend space & time around them. If you happened upon a Warp Dragon, and you fled down what you would think is a safe area, say, a long hallway, expecting to shake the beast off your tail because of the limited room - well, you would be wrong. A WD would, as it began approaching/entering the hall, exert its powers and warp the hallway out and away from its body, allowing access to come and kill you. As it walked down the hall warping it, any rooms on either side would be compressed, crushing anyone in the room. Upon passing/exiting the area, the walls would return to normal. as if nothing occurred. Any living person/thing trapped in the warp effect would be killed. Inanimate objects suffer no permanent effects, regardless of how long it is affected.

~Matt