OH MAI
This certainly is Slendy like we've never seen him before.
It's really original, of course, and it sort of looks at him in an artsy obscure kind of way. It's very different from any other take I've seen on him before.
I also like the subtlety. For instance, If you added any colour to this, it would lose all subtlety and make Slendy look like he just walked home from the circus. Or if his back wasn't turned. It makes him look kind of mysterious.
If I had to criticise it, AND I DO, -_- I'd say the tentacles on his back are kind of all over the place and distract you from the rest of the picture.
Also, he doesn't look all that threatening. He just looks kind of casual, plus his tentacles look kind of like feathers so I'm not sure if he wants to kill me or tickle me.
And finally, where exactly is he? I'm glad he's on a black background, but it's JUST a black background. Where's the woods? Or the foggy streets or something?
Anyway, overall great picture