Grentchus Magnus is a level 20 Grentch boss during the Wintersday quests The Greatest Snowman Ever Made and You're a Mean One, Mr. Grenth. Since 2007, he is an ally for the quest Straight to the Heart, along with additional Grentches, who helps you attack the Secret Lair of the Snowmen. He is the final enemy boss in its Dwayna counterpart, The Strength of Snow.