A blank cardboard Christmas ornament (easily found at Michael's, but I'm sure they have them in other places, as well)
Sharpie markers in black, silver, and gold
Craft glue (like Elmer's Extra Strength Craft Bond glue sticks)
All you have to do is:
Use the Sharpies to paint the ornament
Print out some small skull pictures
Cut the skull pictures out and glue them onto the ornament
Perfect for your Goth Christmas tree!