In order to get your free Steam key, you need to
- Visit Game Giveaway of the Day and press "Idle Champions of the Forgotten Realms - Starter Pack" button
- Post about this promotion on Facebook. If you don't want to publish it, press "Alternatively you can get a personal download link via email" and insert your e-mail address
- Press the download link sent to you and log-in through Steam.
- Fill the form and press "Get the key" button
The Steam key will be send to e-mail used earlier. Base (free-to-play) game Mighty Party is required to activate Starter Pack. Enjoy! :)