Eldritch Rend

You tear at the fabric of reality, creating a rift that distorts the area around a creature. Choose a creature within range; it must make a Dexterity saving throw. On a failed save, the creature takes 3d6 necrotic damage and is disoriented, giving disadvantage on attack rolls until the end of its next turn. On a successful save, it takes half as much damage and is not disoriented. The chaotic nature of this spell makes it particularly unstable; roll a d6 after casting: on a 1-2, you take 1d6 necrotic damage.