Halloween is a great time for beauty junkies and aspiring makeup artists alike. It's a day when they can let their creativity run wild, show us their impressive skills, and even teach us a trick or two. Although some of their more intricate makeup looks require a lot of different tools (and a good dose of patience!), a few of our favourites actually mainly call for a good eyeliner. Obviously, if you have a little more time and a few more products, you may wish to add colour or contour as many of these Halloween queens have, but if not, just liner is enough for a simple spooky effect. Don't believe us? Keep reading to see what you could do with this one simple piece of makeup and a little imagination.