You receive a glance at the future. Until the spell ends, if you would normally surprised, roll a d20, and on a 15 or higher you are not surprised and you gain a +2 bonus to initiative, and on a 14 or less you receive a -2 bonus to initiative and are surprised. The spell ends after that. If you cast this spell while the spell is already going, this one keeps going and the newly cast spell is stopped.