Using this ability, Simon can alter the ages of others, making them younger or older. He can also alter the rate at which people age, and can use this to make others immortal. He can use this ability on any person, animal or plant, simply by aiming his hand at that person, or by thinking of the person, though this method is harder. He doesn't need contact. However, unlike with age alteration, he cannot use it upon himself to alter his own age or ageing rate.