For all of you who are getting killed by the Dragons/Dragon King in the Gatekeeper Quest here is an easy way to defeat them, infact this was far easier than the Sunken Monastery (with the Abandoned Ones who I felt were harder to kill)
Make lots of "Resist Magic Potion" using your alchemic skills and when talking to the Dragon King choose the 3rd option, he will throw you in jail, there are 2 hidden buttons on the walls which open up into 2 passages which lead to the main dragon lair. (I had about 8 potions and they were enuf for all of them)
Now just drink Resist Magic Potion and go out near the entrance to the passage, the Dragon King and all his dragons will attack you, all their fireballs cause 0 damage!!
Just start attacking them with Lightening storm, bolts and fireballs (Make sure the wands are fully charged beforehand when you are in the jail as you can't recharge them mid-battle) Keep ducking into the passage to refresh your resist magic potion and attack again.
I killed all the Dragons and the Dragon King by just replenishing my mana & health once. Boy was I surprised that it was this easy
