A retrophrenologist is an npc who can permanently change your stats. One service they provide is increasing a stat by one point while decreasing a different stat by one point. This is known as retroing, and can be done multiple times.
They also handle rearranging.
If you're not happy with your current stat arrangement, and you have already rearranged (or don't want to yet), you can get a retrophrenologist to permanently move a point from one stat to another. You can't make a stat (permanently) lower than 8 or higher than 23 this way.
Saying "help" gets their attention; after that you may have to say "yes" multiple times. They will ask you which stat you want to decrease and which one you want to increase, then tell you how much it will cost and ask you to confirm.
After you confirm, they'll take your money and perform the operation. This will leave you unconscious for a few minutes and with severe temporary penalties to all of your stats for some time after that. Notably, your lowered strength is likely to cause you to drop anything you aren't wearing (including money), so you should put everything besides the retrophrenologist's fee in worn containers if you don't want to drop it. The stat penalties last a while, although the Restore ritual can fix it.
It costs &&&&&&&&&&+40000 for your first time. If you wait at least twenty weeks between visits, then subsequent visits will increase in cost by &&&&&&&&&&+40000 each time--so the second time will cost &&&&&&&&&&+80000 , the third time will cost &&&&&&&&&+120000 , and so on.
However, if you want to retro another point sooner than that, it will cost much more--for example, if you want to retro another point immediately after your very first visit, this will cost &&&&&&&&+5640000 , and if you've had more than one point retroed in the past, the extra cost is even greater. This goes down over time, so waiting ten weeks will get you a lower price than doing it again immediately, though still much more than if you had waited the full twenty weeks.
If you have not rearranged yet, you can go to a retrophrenologist and say "rearrange" to start the process. This lets you change your stats according to your preferences, with some restrictions: a stat may not be less than 8 or greater than 23, and all your stats can add up to at most 65.
This is free, but you may only do it once. It's therefore advisable to make sure you know what you're doing first, since your rearrange affects all your skills, your regeneration rates for gp and hp, the amount you can carry, and other things.
As with retroing, you will end up unconscious and with penalties to all your stats afterwards, but the penalties aren't nearly as severe as they are after retroing.
- Zorgo the Retrophrenologist sets up shop in Ankh-Morpork, in the Isle of Gods.
- Mr Ralph Womblefluff in Ohulan Cutash has his operating room on Long Alley.
- Ptricka-ptreat's house of retrophrenology is on Ephebe Road in Djelibeybi, near its northeast end.
- Ral-Fee's Retro-Spa is on Onetwolong Avenue in Bes Pelargic (running along the southern edge of the city on the west side).
- A tent in the North-West of the Oasis (for Ephebian speakers) although at time of writing then NPC is run-timing and although the tent loads, it can not be used for re-arranging.
- In real time, not Disc time.
- Either -1 to all or -2 to all.