exciting! mysterious! enchanting!
a mystery pack comes with AT LEAST:

1x 8.5 by 11 inch giclee print (open edition)
1x greeting card or postcard (maybe both!)
1x vinyl stickers (maybe 2!)

But there will be other random prints and mini prints thrown into these packs, so it will always be a surprise. 
you never know what youll get but guaranteed it will be a deal.