For a limited time only, people who get a free copy of Magicka: Wizard Wars from Amazon will receive an Amazon exclusive in-game Imp character.
1. Go here
2. Click to buy the $0 Base Game.
5. If you don't live in the US, just use a US address as your location to be able to checkout
4. Afterwards will give you two Steam Keys, one for the Imp, one to add the base game thats already free on Steam