Death Fog

Fog like Magical darkness spreads from  within a circular range of a 25ft area and 7ft high around you or an object of your choice for the duration. The darkness spreads around corners. A creature with darkvision can't see through this darkness, and nonmagical light can't illuminate it.

If the point you choose is on an object you are holding or one that isn't being worn or carried, the darkness emanates from the object and moves with it.

If any of this spell's area overlaps with an area of light created by a spell of 2nd level or lower, the spell that created the light is dispelled.

You can sense the exact location of any object or creature with your Dark Fog.

When attacking something within your Dark Fog enemies will need to roll a perception check of 16 or higher or the attack becomes a stealth attack and does a extra 1D6 of damage, and on a successful save your attack misses.

Any creature (besides caster) within the Dark Fog has disadvantage on Dexterity saves.