
Hot food is the only way to remove the Cold effect and allow you to heal yourself.

However, he does have a 25% weakness to fire. He cannot be ragdolled, and is immune to all forms of paralysis, as well as to Mehrunes' Razor, Mora's Grasp, Whirlwind Cloak, and the instant kill effect of Wabbajack. Karstaag has impressive resistances, with 100% resistance to disease, frost, and poison, as well as a 75% resistance to shock. If you leave the courtyard during the battle, Karstaag will have the blizzard surrounding him again when you reenter, but it will become a frost cloak very soon after reentering. The blizzard will dissipate after a short time, and he will have a Frost Cloak surrounding him for the rest of the battle.

When summoned, he appears with a Blizzard around himself, which will ragdoll you if you stand too close. He is much more powerful than a regular giant, being able to attack with his club, causing you to lose several hundred health points. In combat, Karstaag can summon three ice wraiths at a time to distract you. He is one of the toughest enemies in the game, having nearly double the health of the Ebony Warrior. After defeating Karstaag, you gain the ability to summon him, but only three times, and only outdoors.

The spirit of this ancient creature can be raised as part of the unmarked quest Summoning Karstaag. Karstaag was a frost giant who lived on Solstheim, and has been dead for over 200 years.
