The Idea: When conversing with someone of a higher intellectual level they briefly make remarks regarding a way to make your enemies your own. Turn the strongest ones of the dark into the protectees of the light. So you inquire about the said practice and he gives you a book, the book that dates back centuries with this practice. But he warns you, this is a dangerous feat to attempt. You shrug it off as you're overwhelmed with the idea of a powerful force you can control. The text is in an ancient language your eye cannot depict, but you know somebody who can. You take the book to the translator and he is only able to translate some parts of it. He's the only one who knows how. Although some parts of the book are blacked out you still want to try it. You craft the mob using special items (not sure on the specifics of these items yet) and the mob spawns. At first, it's peaceful and you think you've done it... but due to the untranslated text, you forgot the most important part. How to make it fight for the light, instead of the dark. You create the villain but don't cast the spell to make it work for you. You're no match for this mob but it won't let you get away. You must fight it.