Draining Light

You flick a wrist at one creature. A blinding pillar of light appears over the  creature, and they must make a saving throw equal to the caster's spell save DC. The creature take 3d8 radiant damage, or half that on a successful save. When damaging the creature, the caster heals half the total amount dealt (Rounded up).

You can add 1d8 damage for every spell slot used above 3th level. You can also heal 3/4th of the damage dealt (rounded up) if you use a 6th level spell slot or higher.