Jammerware is offering a League of Legends companion app for your Windows Phone. The Imp is a free app over at the Marketplace and offers a complete breakdown of all the champions, items, runes, and summoner spells in the game and the ability to create and save your own builds.

If you're a League of Legends aficionado, The Imp may help you get through the game a with fewer bumps and bruises. You can download your copy of The Imp here (opens Zune) at the Marketplace.