Didn't go for anything particularly original with the design, the main part was inspired by a number of designs on Google images, and the thumb nail from some more! Apologies for the mess on these, as you can see one was taken pre-clean up!
To get the checked effect, based on the colours of the different houses at Hogwarts, I used nail art tape, and for the deathly hallows symbol I used a nail art pen. Had a bit of trouble with it coming out too thick. I think in future I'd just do it freehand as it's a fairly simple shape. That's all there is to it really. can't believe how long ago it was! (summer 2014)