53 FOUNTAIN OF TOOTH. This magnificent fountain is decorated with stone bas-relief teeth: incisors, molars, canines. The water is hard (high in mineral content) and tastes a bit metallic. Drinking even a sip of this water will cause the imbiber to grow a new tooth. If the character is missing a tooth, the missing spot will be repopulated. If not, a supernumerary tooth will grow.
Gaining one tooth has absolutely no game effect and as many teeth as a desired can be gained through this method. However, if excessive (greater than about a dozen teeth are gained), they will affect breathing and cause a -1 to constitution. If more than two dozen teeth are gained, they will clog the mouth and the character will die of asphyxiation (as per drowning rules) unless they are surgically or magically removed.