Twilight Dream

A wave of dark energy emanates from you in a 20-foot sphere. Creatures within the radius must make a Wisdom saving throw against your spell save DC. On a failure, a creature takes 4d6 psychic damage and is silenced for 1 minute, or until they make their saving throw. Creatures may retry the saving throw at the end of their turn.
On a success, a creature takes half the damage rolled and is not silenced.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd. Additionally, when you cast this spell using a spell slot of 5th level or higher, the radius increases by 5 feet for every 2 slot levels above 3rd.