But it has a Weakness to fire, so an enchanted blade will kill it instantly.
The creature has a 100% Chameleon ability, 500 hp, and is immune to frost. Finish the Journal, it has useful information. You can meet Sveenja, kill a monster called the Uderfrykte, and become leader of the settlement. If you've played the Bloodmoon expansion from Morrowind, these names will be familiar. The journal describes his wedding to Sveenja Snow-Song, his leadership of the Thirsk Settlement, and their quest to destroy a creature called the 'Uderfrykte Matron'. When you are at Dive Rock, you'll find an unoccupied campsite, and find a journal that belongs to a person called Agnar the Unwavering. A short walk southeast, you'll find Walker Camp, with two Dark Elves who are Thugs. He is also a master trainer in Acrobatics. Don't worry, there are no bandits, just a Nord named Torbern. More than likely you'll pass Aerin's Camp on the way up. It's quite long a trek to get to, so be prepared for a fight.
Dive rock is a high mountian on the north-eastern border of Cyrodiil, near Cheydinhal.