This costume looks like it could've come straight out of Elden Ring. Only suggestion I'd give seeing the unedited photo is that i feel like the patina on the headpiece has a much starker contrast between the corroded green and the more copper-ish/bronz-y areas. I think if the bronze looked more dull and faded as well would probably blend a bit better.

Please don't take that the wrong way, overall it's still a kick ass costume, just some small thoughts i had that might help if you make anything else in this style down the road :)