For the 'Clay Companion' spell by DDD for Transformania-Time!
"To your great humiliation, your body has been reduced to a simple lump of clay, molded into the shape of a sexy, curvy, naked woman. You stand less than a foot tall and, although you can still move, you are completely unable to cast spells on your own - all your mana is your owner's to use now. When your owner's hands touch your body, it changes into soft, wet, moldable clay, that can be reshaped into any form they'd like - and for you it feels just heavenly, as your entire soft body becomes one big erogenous zone, making you moan internally every time they knead and form you... One day they might make you a little clay horsey. The next you find yourself a lovely dildo. No matter what strange and outlandish things they mold you into, though, you always return to your base form eventually - the lovely little naked clay lady."