I love the details that bring this picture into full focus. The blood puddle on the pentagram by the white burning candles, the knife in Harry's loose hand with the blood from his wrist or forearm flowing down to the ground, robe around his naked body, the marks on his back that his soul oozes through to the mirror in which Snape is stepping through with his hand outstretched and his face full of horror, his broken glasses on the ground, the light emanating from the candles and the pentagram on the ground, the details on the antique mirror, and the storage bookcases filled with odd ends and items that is the backdrop behind the mirror.
It is incredible.
You most certainly show that you are an artist at your craft. How long did you work on this?