The tag alias #66189 bladecham -> blade4649 has been approved.

Reason: This is the same artist. The bladecham entry incorrectly stated that bladechan28 was this artist as well, they are not. They are different artists. I have fixed this.

EDIT: The tag alias bladecham -> blade4649 (forum #389932) has been approved by @slyroon.

No idea why I didn't include further proof on this one. This artist is Blade, a member of the doujin circle Galaxist. e621's artist entries for this artist aren't great, but Danbooru has a very detailed one: https://danbooru.donmai.us/artists/8181

Bladecham appears to be an alias they used on a website called sakura.ne.jp. Their current alias is blade4649. The uploads tagged bladecham are mostly sourced to other booru sites and a couple dead pixiv uploads. However, you will find that on Danbooru and Gelbooru all of the images from here tagged bladecham are tagged as Blade (Galaxist), which is their tag for blade4649.

The tag alias bladecham -> blade4649 (forum #389932) has been approved by @slyroon.