Originally Posted by SeerCassandraTrelawney

Cassandra looked at the Slytherin sitting on the cot and then smirked. "I think we can do more than pretend..." She moved her wand over the girl's knee and a large bloody gash appeared on the girl's flesh. "Don't worry, it is just a medical illusion... not a real wound. It doesn't hurt." She told not just the girl but the whole class.

"Now let's say this student just won the Quidditch Championship game, throddling herself to the ground and breaking her leg in 7 parts, shaddering her knee..." She swallowed and looked at the other students. "For some reason, the nurse was called away and cannot dignose and heal her. A simple Episkey will not do... The girl will need a splint." She pointed and flicked at the girls leg and said "Aidonsi Traci!" A splint appeared around the girl's leg and kept it completetly immoble.

"Now, the wound is still open to the elements and it can become infected. Clean the wound using the Tergeo spell and then, instead of putting the ointment in your hand, put it directly on the wound." Cassandra tergeo-ed the affected area, then she twirled out her wand in a circle over the fake wound, "Antiarius Ontin!" She said and a clear gel like substance dribbled out of her wand, covering the gash and making it disappear.

"Now, the leg is immoble, the wound is cleaned and medicated, let's wrap the whole thing up." She said moving to the back of the cot, for a better angle. "When you conjure the bandages, you'll most likely have them in a pile on the ground, or on the stomach of the person... this is fine, the gauze remains sterile until in contact with the wound." She said and then looked at Toussaint, to acknoledge his question from earlier. "Pick it up and wrap it around tightly enough that two fingers can snuggley be tucked in. I on the other hand was trained by a St. Mungo's healer, and can wrap it around as I summon..." She said proudly.
She then proceeded to make a swoop with her wand, and saying "Inurio Bani!"

As the gauze came out of her wand she guided it around the girl's leg and wrapped it carefully. Once that was done, she tucked two fingers under the bandage, making sure it was tight enough. "Perfect." She looked out to the class. "Questions before I ask you to practice on each other? No wounds please... that was for display only."