A young man sits beneath a beautiful aurora and dreams about a beautiful maress with amethyst eyes. That same night Amy watches the same sky feeling a power come over her.
The next day, the young man wakes to the beautiful amethyst eyes of the maress. Finding himself completely ensnared in her beauty and lust.
I’d like to see a male archaeologist exploring a ruined Na’vi/Avatar temple when the idol he finds there turns him into an Amazoness Na’vi temple guardian.
Since you're taking down ideas for transformations down here's another one for you
A male has a sex session with a female escort where he uses a transformative condom on her that slowly turns her into a onahole/fleshlight. Afterwords he takes the sex toy home to put along side other women transformed into onaholes/fleshlights on a shelf like trophies