Blur

Your body becomes blurred, shifting and wavering to all who can see you. For the duration, any creature has disadvantage on attack rolls against you. 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 4th or 5th level, the duration is concentration up to 10 minutes. When you cast this spell using a spell slot of 6th or 7th level, the duration is concentration up to 1 hour. When you cast this spell using a spell slot of 8th level or higher, the duration is 8 hours and the spell no longer requires concentration.