You create a massive blanket of heavy fog that covers the area within 500 feet of you for the duration. The fog spreads around corners, and its area is lightly obscured. After you create it, the fog drifts along like a normal bank of fog and doesn’t remain centered on you.    When you cast the spell, you can designate any number of creatures to be unaffected by it. A creature in the fog or a creature looking into the fog from the outside can’t see more than 60 feet in the fog. A strong wind (at least 20 miles per hour) disperses the fog after 1 minute.