Mentorian

Mentorian is a tall mage dwelling in Cove during Ultima IV.

Description
Mentorian's young apprentice Jingles could be found in Paws, where the youth would gladly tell the Stranger of his master's knowledge of the Gate Travel spell and would describe the remote village of Cove and how travel to it might be possible.

Once the hero managed to find the hidden settlement, Mentorian could be found therein, seeking out ways to divine greater Truth through magic. If asked regarding the Gate Travel spell, he would see the aspirant's ankh and reveal the components (sulfurous ash, black pearl and mandrake root) to them, taking kindly to the Stranger in light of their pilgrimage toward Avatarhood.

Trivia

 * In the Nintendo port of Ultima IV, the Japanese developers obviously translitterated Mentorian's name into Japanese characters, but when the game was localized in English, the name was erroneously rendered as "Mentallion".
 * In the NES port, Mentorian-Mentallion claims to be the "Master of the Gates", that is not a title or position, but it just means that he mastered the Gate Travel spell.
 * In the alleged journal of the Avatar discovered by historians Robert De Main and Carlotta Stein, Mentorian exacts a promise from the hero not to reveal the composition of the Gate Travel spell to anyone else.