Eldritch Mist

You cause an alien mist to engulf the area.

Within 1 mile of your current location, a thick mist in a color of your choice forms. This mist cannot be dispersed by normal means, and all beings within the mist are heavily obscured, and are unable to find their way to your location unless they make a Wisdom (Survival) check against your spell save DC at disadvantage. You may choose a number of beings equivalent to your proficiency bonus that you can see to remain unaffected by the spell.

If a being spends at least one hour within the mist, they must make a Constitution saving throw against your spell save DC, taking force damage equivalent to your level on a failure.

At Higher Levels. When this spell is cast using a spell slot higher than 7th, the spell lasts until it is dispelled.