Asotl being a good bird for me and demonstrating the use of the pedestal penetrating machine.
A contraption I created years ago and have reworked a few times. It's sort of a One bar prison type design with added restraint security.
Featuring a strong dildo piston mounted atop a central shaft. The piston unit is fitted with a sloped crotch seat to prevent forward and backward movement misaligning the user from the dildo bellow. The unit has both ankle and thigh locking restraints and a backrest with added waist and chest straps keeping the correct upright posture. Arm binders can be fitted behind the backrest to keep hands under control.
But you ask what is this contraption for?????
Can be for many uses. Restraining troublesome magical prisoners and using the dildo penetration to break their concentration or they may use their magic to try and escape.
Other uses could be in restraining a captive in a desirable posture while you get them turned to stone to make a nice and shiny display object.
Asotl was so helpful in demonstrating that too.