the earth lord thingie? sure
well, what you need is to change his armor to something that that is suiting and contrasting at the same time, for example, dark earthy body should be contrasted with really light colored stone armor, or maybe even white marble. let a bit of your creativity pull you
i for an example, haven't seen many people use the terrain tile textures that game has, for a model
next thing you could do is to separate the body of the firelord into rock-like chunks, since, well.. rock isn't that 'fluid' as lava
next.. might wanna remove the tint he has and tweak the particles so that they're earth-ish, instead of being still like from the firelord