You conjure a phantasmal scythe of death in your open hand and throw it whirling through the air. The scythe travels in a 60-foot long, 10-foot wide line, coming to rest hovering in the air at the end of its line or before it strikes any solid objects. Each creature within the area while the scythe is moving must make a Dexterity saving throw or take 6d8 necrotic damage, or half as much on a successful save. A creature has disadvantage on this saving throw if the scythe comes to rest in the creature’s space.   If you are within 120 feet of the scythe at the start of your next turn, it returns to you in a 10-foot wide line, forcing creatures within its area of travel to make saving throws against the scythe’s damage.