Sedridor is the head wizard and chief of research at the Wizards' Tower, which trains wizards in the magical arts. He can be found in his office in the basement of the tower. After completion of Rune Mysteries, players can use him among other wizards to teleport to the rune essence mine.
Sedridor oversees the Wizards' Tower. In the Rune Mysteries quest, Sedridor, having struggled to rediscover the knowledge of runestone creation, which was lost after the destruction of the tower by Zamorakian mages decades ago, recently succeeds in this task largely due to the efforts of the player who brought him an unidentified air talisman from Lumbridge's Duke Horacio, who knows of Sedridor and his vast lore well enough to send it to him for examination. He is located in the tower's basement. The player is required to talk to him twice during Rune Mysteries. After the said quest, the player can use him to teleport to the rune essence mine, where rune or pure essence can be mined. He is seldom visited for this because he is so far away from a bank whereas Aubury or Wizard Distentor are very close to a bank. Sedridor has conducted extensive research on runes and the secrets of crafting runestones, eventually combining his research with that of Aubury's rune knowledge to unlock the secrets of the air talisman, thus considerably increasing the wizards' supply of runes.