ok here is my review:
I like the concept of some metal elemental, but there are a few things that could be improved:
1. Change the texture of the hands into some metal texture as they look really random right now
2. You have to edit thegeoset animations because the model is visible in the dissipate animation
3. Remove the footprint event object because your model is floating and does not even have legs
4. Edit the death sound effect into a more fitting one(maybe just the siege golem sound) and change the dissipate effect from undead to human,orc or nightelf
5. I think you should make the hand particles a bit smaller and maybe tinting the purple-white star into a yellow one aswell
6. maybe some falling particles from the bottom of the body?
I think I will rate it with 4/5 when you have done some improvements on it