Thöörsten's Treasüre, an Umlaut-laden Düngeön

From the introduction: Some years ago, the famed sorcerer Thöörsten the Obscüre separated himself from society and disappeared into the wilderness. Rumor has it some great tragedy befell him, and his remains are lost in a tortuously carved grotto, with an army of mad hömüncüli guarding his most valuable treasure...