This Divine Spark belonging to Mystryl is how she can foretell the future. Though much of what she can see is vague, her knowledge of The Weave allows her to interpret what she sees and feels to understand the future.
Found by the party inside a chest (room 7 on the map) the located in Mystra’s Hall of Echos
Attuned: You gain +3 on initiative rolls, once per day you can can change swap out one prepared spell as a free action.