Okay, so… this is very, very messy-looking. You don't have proper formatting (please use the templates available in the How to Write an SCP Guide for the bolded headers) and most of your paragraphs are giant walls of text, with makes the piece look both lazy and disorganized.
The containment procedures are excessive and overly-detailed. Why on earth does this thing need exactly 2 meters of steel and concrete plus extra steel? 5 meters is 16 feet, almost a story and a half; at that point you have almost a small building, not a cell. Also, you have a lot of capitalization errors—Level-4, Foundation, and so on. I recommend reading this guide on containment to get a feel for how to write more logical, resource-conserving procedures.
With regards to the description, it's basically a too-long version of a video game boss. You have a lot of unnecessary description about all its random physical features, even down to the size of its scales (which I don't think the reader really needs to memorize or even know to begin with to properly understand the article). The fact that there's a character with the same name as your username that features heavily in the story makes it seem like it only exists as a means of getting yourself/your self-insert on the site, rather than focusing on presenting an interesting story for the audience.
This will need a ton of work if you want it to stand a chance on the mainsite. I think you should take it to the Ideas and Brainstorming forum before you try fixing the draft. Go to that forum, post a quick summary of the concept you want to write up (don't link the draft unless someone asks), and reviewers there can help you make the idea more interesting.
