All-knowing

When Thor are Loki were children Odin showed them the summoning of an All knowing. The Wise All knowings can tell your future.
But you must summon them on a midsummer night with the moon high in the sky or the All knowing will not show itself. You need a piece of a siren tail, a feather of a pegasus and the blood of two royals.
When Odin summoned an all knowing it was merely a child, she told them that Thor will one day meet the love of his life in Midgard and Loki was bound to be the cleverest man in Asgard. Odin decided that the All knowing girl could be used as a teacher for the boys, she accepted the offer and became a part of the house hold.
When she finally left she was sure she would never see the two again.
she was wrong.