How to defeat scylla

When trying to save angel scylla will challenge you (again).but this time she will not run away .first locate the three colored keys(red,blue,green).when you have found all of them go into the training room scylla will tranform into a demonic snake ,first,hit until she is knocked down real good ,to make sure of that do a power kick,then find a rectangle shaped button,it will have small blue rectangles inside it ,press it ,when demonic snake scylla wakes up run towards the center of the room ,she will burn and turn to dust.then after that a short movie will start,if not open the door opposite to where you came in.if you want a surprise don't skip through the movie.