I got close enough to hit with my Pyro spells and proceeded to cast about 10-12 spells and killed him. Could probably be done with arrows, miracles, or sorceries as well. I took almost no damage cause he just sits their and spews poison. Have to get within the pools range as a pyro, but it is easy to back out in time.
"The only good is knowledge and the only evil is ignorance."-Socrates
Thanks for the quick response, anyone care to answer the second question? It seems I will need to lift some seal before I can traverse the Gaint's tomb? And where to buy the item that light up the area?