I apologize, this isn't as good as the last two. I honestly struggled with the background despite the brush use, it's so hard to come up with a good idea that fits into the previous themes.
But that aside, here's Fire, which is obvious. Next up is Water, and I might do more if I can be arsed.
No no I like the idea I just want to do the original four first. I think Shadow would be Chaos or something, but originally I was going to put him as Earth and Silver as water. As the four that can go super XD