Mass Blur

6th-level illusion   Casting time: 1 action   Range: 60 feet   Target: up to six creatures you can see within a 30-foot-radius sphere within range   Components: V   Duration: Concentration, up to 1 minutes   Classes: Sorcerer, Wizard   Subclasses:  
A haze of obscuring illusion magic swirls out from a point you can see within range. Choose up to six creatures you can see within a 30-foot-radius sphere centered on that point. For the duration, creatures have disadvantage on attack rolls against any of the targets. An attacker is immune to this effect if it doesn’t rely on sight, as with blindsight, or can see through illusions, as with truesight.
  At Higher Levels. When you cast this spell using a spell slot of 7th level or higher, for each slot level above 6th, the radius increases by 10 feet and you can choose one additional creature you can see within the radius.