Winter's Radiance

6th-level evocation   Casting time: 1 action   Range: 400 feet (30-foot cube)   Target:   Components: V, S, M (a piece of polished glass)   Duration: Concentration, up to 1 minute   Classes: Cleric, Druid, Sorcerer, Wizard   Subclasses:  
When you cast this spell, the piercing rays of a day's worth of sunlight reflecting off of fresh snow blankets the area. Creatures caught in the spell's area of effect must succeed on a Constitution saving throw or suffer disadvantage on ranged attacks and Wisdom (Perception) checks for the duration of the spell. In addition, affected creatures suffer such hampered vision that foes they target are treated as having three-quarters cover.