The Orb of Amyntall

You create a 30-foot-radius sphere of Sunlight centered on a point within range. The sphere spreads around corners, and its area is heavily obscured.  Any creatures who enter the orb or start their turn in the orb must pass a Wisdom save or be blinded for 1 minute.  They can make another Wisdom save at the end of each of their turns to dispel the blindness. It lasts for the duration or until dispelled.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the radius of the light increases by 10 feet for each slot level above 3rd.