You had asked for to explore the unknown tomb of changes. Some of the people around looked at you questioningly considering the tomb didn't seem to have deathtraps however the first expedition came back really early as one of the first traps managed to turn a lot of people into babies and now they were a bit of a liability as the guild couldn't just fire them, and several of them didn't have family either.
You explained "Maybe I could find some odd artifact inside that could help with the first few. Considering what I am some of the traps may not even affect me. If i'd event accidentally trigger them that is." You got some gear and before you went to transport someone stopped you.
A little girl with a backpack on asked "Would you take me with you?"
You asked "Who are you exactly?"
The little girl stood straight and said "Catherine Canthrope, I was one of the original explorers to the tomb and I need to go back. I may not be big or strong, but that tomb is less about physical traps anyways."
You sighed and said "You also want to trigger an aging trap don't you?"
The little girl stood on her tip toes and said "And you want something that'll make you normal or something don't you?"
You said "Just don't get in my way, don't blame me if you turn into a fetus."
You and Catherine went to the tomb. It seemed more like a hole in a mountain, but it was rather unknown. Going inside you ended up finding a couple of glyphs here and there and read out loud "Be pure... this room will cleanse you of all your sins before you enter inside... youth youth young young..." You got what it meant and said "I guess your team couldn't read the glyphs. That baby thing wasn't a trap, but a feature. It purifies us by regressing us... So it's most likely that the tomb was designed to be done once you were turned into a baby. Which is also probably why you are fine mentally."
Catherine asked "So we just accept becoming babies?"
You said "Well if you want to get older then yes you'll need to be a baby for the third time. For myself though either three things will happen. Since I wasn't born I may just cease to exist, second it may just revert myself to what I was when I first existed which was about as strong as a young child, and third It's possible that I may not be affected at all. Do you still want to come in?"
Catherine said "Of course, if it's a feature there must be some way to get older inside!" and started stomping inside. You walked inside as well as the glyphs activated. Catherine indeed shrank down to a baby, but you were shrinking down as well. A few seconds later you stopped shrinking and seemed more like a little kid than the baby Catherine in front of you.
Your backpack was too heavy for you to carry so you dropped it and said "Catherine, I'll help us move a bit faster..." You tried lifting her, but she was a little too heavy for you to lift with your child strength. So you put her on some of her old clothes and started to drag her through the tomb. The first section was finished and now you were in a long hallway. You were looking for traps or runes while pulling Catherine and found...