You'll have to get a model that is just a 2d pic. some attacks like the Shaman's shock could be used, but you would need to edit the model, to change the material's blending mode and the pathname to the skin picture you want.
im using a normal 2-d picture, im trying to do 2 things, one im trying to make the coin item my picture and then im taking another pic and trying to make units that pic.