"Now," says the witch, "you are absolutely welcome to keep the set of legs indefinitely. However, my personal skills run more towards the encapsulation and the transference, not so much to the sticking. They have ludicrous numbers of practical magicians on land, I'm sure you won't have any trouble getting someone to attach them permanently if you like them. If you can't, they'll come off and you'll have a tail again, but I can reattach them for another try, no extra charge." She plucks the glass containing the legs off its coral shelf. "Do we have a deal, my dear?"