Gastad

Gastad is a gargantuan mimic-like creature which takes the appearance of a small town. It can get up and walk using many, thick, pseudopod tendrils that leave large, distinct, rut-like tracks. Furthermore, It can dig itself into the ground to appear as an ordinary town to the untrained eye. It's is sentient and lures travelers in to eat who are exhausted from trekking though the empty planes.

History
Gastad started as an unremarkable outpost town on the outskirts of the Northern Province until it was attacked by a gigantic mimic. This mimic had wandered into the Far Lands and became warped and mutated, turning into a massive monstrosity. It ate everyone who didn't flee and took the form of the town.