You're the personification of Evil.

Or you would be if you weren't trapped by the gods inside a magical tree.

But after millennia of waiting, you notice that you suddenly have some wiggle room, and you want to take advantage of it if it means coming back to defeat your enemies and ruling the way you wanted to in the first place.

You can use your Evil Energy to influence the nearby villagers. Make them doubt their faith, and they'll be more willing to take an interest in you.

Make them lose their faith, and you may gain a convert.

The more followers you have, the more Evil Energy you have to leverage. And when they pray to you (remember what that felt like?), you can use the energy of those prayers to grow your influence and eventually break free of your prison.

EDIT: Ported to Windows and Android. Here's a handy URL to explain how to install an app outside of the Google Play store: http://www.cnet.com/how-to/how-to-install-apps-outside-of-google-play/