Unseelie Starlight

You open a gateway to the dark realms of the Unseelie Court, a desolate land of freezing gales and eternal twilight. A 20-foot-radius sphere of eerie twilight and bitter cold appears, centered on a point with range and lasting for the duration. This area is filled with a cacophony of whipping winds and twisted whispers that can be heard up to 30 feet away and creatures fully within the area are deafened.

The wind and ice create a harsh environment, and the area is difficult terrain. Any creature that starts its turn in the area takes 2d6 cold damage. Any creature that ends its turn in the area must succeed on a Wisdom saving throw or take 2d6 Psychic damage as the twisted twilight plays havoc on their mind.