Deconstruction

A stream of purple energy emits from you in a line 30 feet long and 5 feet wide in a direction you choose. Each creature that starts or ends its turn in the line must succeed an intelligence saving throw or take 1d8 Psychic damage and substract 1d4 from the next intelligence or wisdom saving throw until the spell ends.

At higher spell levels the damage increases by 1d8 and at 6th and 8th spell level it emits one additional line.