Nathair's Mischief

Fill a 20-ft. cube centered on a point within range with fey and draconic chaos. Roll 1d4 when the cube appears and at the start of each of your turns: 1 creatures are charmed until start of your next turn; 2 creatures are blinded until start of your next turn; 3 creatures must make a WIS save or move 10 ft. in a random safe direction; 4 the area is difficult terrain. Before rolling each turn, you may move the cube up to 10 ft.