When creating the Phantom Card, Aiwass was still able to sit in a wheelchair.
But for the advanced ritual, this was not possible.
Fortunately, Aiwass had fed the Shadow Demon enough that morning. Even when he stood up and was fully linked with his own shadow, the Shadow Demon that awoke didn't lose control at all.
The shadow under Aiwass's feet wriggled slightly, occasionally lifting a bit to show that it was still alive, still present.
The shadow that occasionally floated up reminded one of the "Aura of Immortality" special effect created from dry ice—except this aura was of a pure black, without any other colors.
It was really more like an aura of dark magic.
In actuality, the materials and process of the advanced ritual were not entirely consistent.