Baleful Polymorph: While a transfer and not a polymorph, there are certain distinctly not-nice people who find it… amusing… to upload their captured enemies’ minds into, say, their tropical fish rather than just keep them in dead storage, if it turns out they might be useful later. Although, really, spending a lot of time in a fish tank is positively benevolent compared to some applications of perverted sophotechnology, if it comes to that.