Chromatic beam

The caster looks in the direction which they want to unleash their power and as they crush the vial in their palm, their eyes flicker with dark greenish light as it envelopes their face and a 5 ft wide beam of either acid, fire, ice, rocks, or air shoots outward dealing 5d6 force damage. The impact zone is 5 feet but it also damages any creatures,structures and even beings from the ethereal plane in a 5 feet area around it. In that area damage is halved. Any targets in the impact zone must succeed on a Constitution saving throw. Targets in the center zone take additional damage equal to your total level. Targets adjacent to the impact zone take half damage and require no saving throw unless they have a feature that can assist them negating or reducing the damage.

Unstable magic: Because this spell is new it is unstable. After casting it the caster must succeed on a DC 11+con.mod. or take 2d6 necrotic damage.

The force damage dice increases by 2 and the necrotic damage dice increase be 1 for each level above 3rd.