It's Belial.

I'm being quite serious on this, you need to try and wake up and not fall asleep again.
He revealed himself to me in my dream last night and fortunately as I was lucid dreaming I could strangle the shit of his snake form before it was too late.

This is not an entity that you want to mess with. The suffering you'd be put through can be truly unbearable from the testimonies of those who have managed to wake up.
And there are many who never woke up to see another day after encountering this demon.
Just don't play the tough guy.
You've been warned.