Hello! I had joined the site 5 years ago as a talent-less teen and, well, didn't do so hot. Here's something I hope you'll approve of. Please be open with criticism and advice.
Overall, this is a deformed humanoid that is stated to perform mind control and with super strength. That, as an anomaly, is not interesting and is rather run-of-the-mill. The traits are generic and do not propose an interesting imagery. You also took too long to get to the actual anomalous aspects here, going through with paragraphs of needless details (that can be summarised).
Also, the supposed narrative that this being is dispatched by a higher power to do something to the Foundation is oddly formed. There is nothing inherently wrong with the idea, but the execution is extremely half-arsed and lacks any buildup that can entertain readers.
Instead, you should show the SCP's personality and build up towards the end. That said, if you keep the base anomalies as they are, the SCP itself would be a tough sell to readers and some might not necessarily go through whatever masterful narrative you envision.
Taken from Security Clearance Levels (which I used as a guide, being a newb I suppose)
Level 3 (Secret)
Level 3 security clearances are given to senior security and research personnel that require in-depth data regarding the source, recovery circumstances, and long-term planning for anomalous objects and entities in containment. Most senior research staff, project managers, security officers, response team members, and Mobile Task Force operatives hold a Level 3 security clearance.
The x was a typo, will be replaced.
It is not stated to perform mind control, simply to be a sort of cult leader- skills and talent, not mind control.
As for the rest, thanks for the feedback, will revise.