I've always been fascinated by planeswalkers with low cost abilities, that aren't too op. Stuff such as Garruk relentless/Garruk the Veil Cursed, Gideon Jura, and Sarkhan the Mad. If you don't know what those are, that's why we have google.
The rules are-
1:Must be a planeswalker. (Duh)
Try to only use 5 or less loyalty on each ability, and not make it too op. Here's one I made - http://mtgcardsmith.com/view/sindor-the-hydromancer?list=user#.Va1rXkV33NU