7. Then apply the Filter effect > Stylize > Glowing Edges, which will create circles around each crystal. It looks more like water drops now.

8. Here the result which I obtained with this method.

9. Now change the layer mode to Color Dodge, which will make the drops less visible in dark areas of the scene. We leave for the moment the drops like that, we’ll return there at the end.

10. Here we’ll create reflexions on the wet ground. Start by duplicating the Castle layer and Clouds layer and merge them together. Now in Edit > Transform choose Vertical Flip to reverse the Reflexions layer. Move it so that the bottom of the stairs is the line of symmetry. Finally you can cut out this layer so that it is only visible on the main alley of the castle.