I used one each of the Sugar Skulls. I colored them with E81, and then added shading with YG91 and 93. The leaves are YG93, 95, 97. I used RV91, 95, 99, V91, 93, 95, 99, E04, 07, 09 and Y21, 23, 26 to decorate the skulls.
Close Up and view of the outside of the card is located on my blog.