Astral Tide

You channel the radiant magnificence of the cosmos, sending a wave of astral light out from your hands, harming your foes and aiding your allies. You can shape this light as a 30-foot cone or a line that is 60 feet long and 5 feet wide. All hostile creature in the spell's area must make a Constitution saving throw, suffering 4d10 radiant damage on a failed save, or half as much on a success. All friendly creatures in the spell's area with at least 1 hit point regain 4d10 hit points. 

Using a Higher-Level Spell Slot. The damage and healing increase by 1d10 for each spell slot level above 5.