Talk:Marek and Lothander/@comment-81.104.204.181-20180107190100/@comment-3234315-20180107191643

You need an unread Tome of Understanding, otherwise Jalantha Mistmyr won't give you the formula against the Geas. There's another one available in the upper level of Durlag's Tower.

If you are a thief or have one in your party – you might be able to steal the item from her.

Otherwise … well … you'd have to create a new Gorion's Ward. ; ) Or load a savegame from before meeting them.