Final Fight
Trial: Finish the level and defeat Satan without being hit by an attack of the opposite magic colour
This is actually pretty simple. I had trouble with this(I was trying to do this and Paladin difficulty at the same time) until I realized you have unlimited magic, ABUSE your Ultimate Light and Ultimate Shadow. I found the easiest way to get hits with these magics was when he places the hexes on the ground. Step into one and you will get caught. When he jumps in the air turn on whatever magic the hex is coloured and you can escape and get out of range of his attack. As Satan is on his knees use the Ultimate move that is opposite. I find the Ultimate Shadow is much more OP as I was able to basically take out half his health bar with ease. Just keep an eye on his staff as he can change as you are hitting him. Turn it off as soon as he changes and regroup.