Area of distortions

Ground and air in 30 ft. sphere centred around caster becomes distorted by illusion. Creatures inside the Illusion can only move 5 ft in their turn. Creatures inside the area lose their sense of direction. If creature wants to move it must throw 1d4. 1 = North, 2 = East, 3 = South, 4 = West. Creature then moves 5 ft. to that direction.
Illusion covers the whole area, all creatures inside the area become blinded. From outside the effected area seems like thick fog and cannot be seen through.

Any creature that ends their turn in the illusion must make WIS saving throw DC 15 or take 1d8 psychic damage.