Cloak of Sand

You create a shifting cloak of sand that wraps around your person and extends out to 15ft from you for the duration of the spell. This area moves with you. The area of the cloak counts as difficult terrain and it lightly obscured for creatures other than you. You may use your bonus action on your turns to increase or decrease the cloak's area up to a maximum of 15ft.

When a creature other than you enters the area for the first time on it's turn or starts it's turn there, it must make a Constitution saving throw as it is buffeted by sand and dust. On a failed save, the creature is blinded until the start of it's next turn.