Black gesso

 you take a transparent sheet, put some black gesso on it, some embossing powder (here I used gold).
You dry with your heat gun...it's going to wrinkle, that good ! you glue other things , here a small branch...

when it's finished you close your window and shutters, you put the transparency in front of a strong lamp, and you take a photo...

 Then you print the photo, you may reverse the colors and you get an "icy page"

then the adventure goes on, you glue, paint, draw on the background whatever you like...

you can even use photoshop like I did with the branches near the bird...