Witches and wizards who belong to the Slytherin house are infamously known for being tricksters: they're cunning and sometimes overly ambitious (think Malfoy). They also tend to veer on the take-over-the-world, evil side. But we digress.
While Slytherin has a bad reputation, the house colors, green and silver, make damn good makeup hues. Check out this video to learn how to create a "Harry Potter and the Deathly Hallows" Slytherin makeup look.