Theorick

Theorick is one of the four adopted children of Marius Twain with the ability to control ice. He defended Nesaak and its surroundings against the corruption, until he froze himself and Nesaak Forest in the quest Fate of the Fallen to stop corruption from spreading.

NPC
Theorick is an NPC for the quest Fate of the Fallen. He gives the player Rickeo's flame to gain access to Ice Barrows and try to kill him. Theorick is located in Past Nesaak.

Boss
Theorick is also the boss of the Ice Barrows dungeon. He can be found in the present day as the boss of Ice Barrows.

Corrupted Theorick is the boss of the Corrupted Ice Barrows.

Theorick is also a boss in the quest A Hunter's Calling.

Trivia

 * From reading the books in Lusuco's Library, it can be implied that Theorick was the most bitter and cold among his siblings, threatening to freeze Mael’s spirit out of him if he didn't deal with the souls of the monsters which he killed while they were alive.
 * Theorick is the only member of the Twain Family who is not dead. Although he is corrupted, unlike his siblings Dwendle, Rickeo and Mael, he is not truly deceased yet.