I made this for my niece, who is crazy obsessed with Harry Potter generally, and Slytherin specifically.
Snape, Draco, and Lucius Malfoy are from a http://www.etsy.com/shop/weelittlestitches pattern. I made up one in the same style of my niece.
The fonts are from a big book of alphabets I picked up at Michael's, and the border is adapted from a 'wavy' border I found online. I added heads and tails to make snakes.
Here it is framed:
A work-in-progress shot:
Close-up of the snakes:
Close-up of the people:
Close-up of the text:
According to my niece, it's "THE BEST THING EVER."