If you want a drawing with your envelope, add this to your order. You may get something nice, you may get blatant memery, who knows.
(Free because boy howdy am I bad at drawing. Nobody should have to spend money on this.)
NOTE: Your order may take a little bit longer to ship if you add this on. Drawing takes time, and it takes a while to get them all done if there turns out to be a lot of people wanting stuff at the same time.