This idea seems fairly generic. This SCP seems to just be a humanoid with superpowers. These are posted on the site and deleted often, so I would recommend looking around series V to see what people are fans of nowadays rather than using such a overly used cliché.
However, if you still want to use this idea even with the knowledge that they are deleted often, I can give you a little advice. First, I would take out the killing and consumption. That just seems like a stereotypical bad monster, which will make the article much harder to pull off successfully. Secondly (and I cannot stress this enough), you need a story. I am not talking about some "it was found and contained after it killed people" generic containment story. I am saying this should have some sort of interesting story. SCPs aren't just objects or beings anymore, they are stories loosely connected to the items and beings in containment.
What if the creature is a "schizophrenic" in a different dimension who everyone in their dimension assumes is just insane. Then you could go into whether our world is just this person's schizophrenia or they are not insane and can see in our world. Or you could have that world's foundation capture them and see the results of a different foundation having such direct access to our foundation. This is an example of a story you can do. If you don't like it, just use it as an example for what a story can look like. Good writing.
