Broken Hourglass

Upon casting this spell you and up to six other willing creatures are suddenly jolted forward or backwards in time. Due to the sheer power you have with this spell you must make an intelligence saving throw against your own spell save DC. If you succeed you can decide exactly what point in time you are traveling, if you fail the save then your DM decides whether you go forward or backwards and what point in time you travel. There is no limit to how far forward or back you can go with this spell.