I like. Might tend to be bred as a defense against poisoning wells in castles and/or desert areas. If one gets all the local clerics together and has them cast purify food and drink
on the well or fills it up with a Decanter of Endless water (or an itenerant Giraffe-a-pump
) is that enough to "jump start" the process so the Wellspring Newt(s) will accept the well/cistern as home or would the load of sub-par water coming in eventually cause them to decide to leave?