Very well composited, excellent extraction & manipulation of the model to get the effect you wanted. I particularly like the way you've enhanced the eyes (& lips) to get a very mesmerising stare, & the construction of the bell jar works well. The sense of movement of the ravens is wonderful, but the drift of green & the mist from the bottle are perhaps less successful.
However, I'm having a little difficulty understanding the lighting. In the original, the only light in the room is from the conservatory windows in the background, so the scene is essentially backlit. The placement of your composition is in the foreground which I think does not allow for the shaft of light from a reflection of the ceiling of the conservatory, if that was your intention. Otherwise there is an implicit light source directly above, which I don't think really works. So unless I've missed something, this is the weak point in your composition.
However, overall a moody piece, with a title that exercises the imagination.