Rukia nodded. Time to think about all her lessons.
She took up a stance first of all. "First I will show you my spiritual energy" she said. She closed her eyes and focused, one arm placed on top at the join of the elbow, her other arm outstretched. An aura of white appeared around her, slowly but surely, getting stronger and stronger. The air around her seemed to react, her clothing fluttering in the strange spiritual wind. Not only that but it felt colder around her. Much colder.
"This is my Reiatsu" she said. "It is my spiritual energy, my spiritual pressure. If it is strong enough, it can be used to make a person frozen with fear. It can even make a person believe they are being attacked even if they are not" she explained.