Even though Co-Optimus is a young site, we've been lucky enough to see a few holiday cards arrive at the HQ. Today we got a card I just had to share with everyone. Blizzard's card features original artwork by Sam "Samwise" Didier and showcases a cast of characters across all of their games. Just look how Lord Diablo spreads the holiday cheer! If that isn't co-op, I don't know what is!