Deaths Draw

Your touch pulls from a target there pure essence of life. Make a melee spell attack against a creature within your reach. On a hit, the target takes 7d8 physic damage, and the target ages 1 year for every hit dice used instantaneously. If the target ages past their life expectancy, they die instantly. 

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d8 for each slot level above 5th.