Sylvie’s star map

As the stars shine down you learn mystic insight of your world. When cast this spell you know you geographic location and how much miles you are away. From a place of your choosing if you cast this spell in a 12 hour period of casting this same spell. Your mind is exposed to mind warping beings of the far realm. You must make a DC 15 wisdoms saving trow or gain long term madness (in the dungeon master’s guide). This spell must also be cast at night or  none of the spell effects happen and you waste a spell slot.