Doom of Summer Years (TP)

You rapidly reduce the age of your target. Choose a living creature within range. At the time the spell is cast and again at the start of each of your turns, your target must make a Constitution saving throw, decreasing 1d4 + 1 years in age on a successful save or 1 year on a failed one. A target ceases the de-aging process once it is reduced to infancy. A creature that is reduced in age retains all of its memories, ability scores, and features, but it gains I level of exhaustion for each 5 years it is reduced in age. A Medium creature reduced to childhood cannot use weapons with the heavy property. A Medium creature reduced to infancy cannot wield weapons or use tools. If the spell ends before 1 minute has passed, the target reverts to its true age. Otherwise, the targets is permanently reduced to its new age. Remove curse and greater restoration can be used to return a creature to its true age. If you ever unintentionally lose concentration on the spell, you gain levels in exhaustion equal to what the target gained from this spell.