Dragonic life

your eyes glow a purplish silver and you start to drain the life out of your opponent. Make a ranged spell attack against the target. On a hit, the target takes 2D6 Taken damage.

This spell improves at 3,5.10 and 20th level. at 3rd level this spell deals 3D6 Taken damage, at 5th it deals 3D8 Taken damage, at 10th level it deals 4D8 damage and at 20th level it douse 5D12 damage 

a oath of life paladin can use this as a if it was a cantrip