You grab the doll labeled "Grow down" doll. It was a plain looking doll. You didnt know how it could be a voodoo doll. You then notice a tag attached to it.
Grow down doll
Attach a hair from any person to the doll. It can be as much as a lock or as little as a single strand. Say the incarnation "Age contra, transformatio" the user will begin to age backwards as fast or as slow as you please until they are regressed out of existence or when you say "processus claudum". The person will not turn back unless a Grow up doll is used. Warning once the person has been regressed out of existence there is no going back as you cannot bring someone back to existence.
You take the doll to the cash register not thinking about buying the grow up doll...at least not yet. You go home and look at the doll wondering who to curse with regression.