Bliss transformed into a sex toy? ;p

How about having p-r-i-s-m-6 transform into a giant battle robot?

Here some ideas you could use:

1. How about Skin transformation is where a being is transform into another being skin, where a person(a female human) is stretch over another being(maybe a male orc or something) melding into the being's body and only leaving outlines features of the women that are left behind after the transformation like the outline of the women face appear on one of the orc's buttocks like this and the palms the of her hands appear where the orc's nipples should be. One of sole of her feet's appear on one of abs of orc and the another sole appear on the inner side of one of the orc's buttocks. Her vagina become the orc's tight puckered butthole and her pubes forms around the orc's puckered butthole like crack hair.

2. Here a interesting concept you could use is skin-swap:

There can be something like a magic spell or ray-gun that can permanently swap skin with a other being like a human swap skin with a dragon or Reptilian being like this and this or with a dragon now imagine the human with lizard-like skin on his body and now imagine a lizard-like being that still have his horns/claws but now having human skin that is stretch over and hugging its body tightly on it body and some of its "new" skin is permanently wedge up its hairy butt-crack.