I did this for a DT challenge for Impression Obsession! These are all brand new stamps just released last month from IO.
The swizzle skulls were colored with a mix of Copic markers and Copic Spica glitter pens.
The background (Harlequin) is part of IO's new Cover A Card background series. These babies are more than 5-1/2" square so that they can cover a full card with one fell swoop!