Channel Life

You may transfer your life force or the lifeforce of an ally or enemy. Make a ranged spell attack against a target within range of 30ft. On a hit, the target takes 3d8 necrotic damage, and another target within range regains hit points equal to the amount of damage dealt.

When you cast this spell you must make a constitution saving throw against the DM. If you fail automatically roll one d4 for damage. 

At Higher Levels: The damage increases by 1d8 per spell level above 3rd