Other than images, I really have no idea what they do or how they function. If I get more information about them, I'm going to send you a message. Cheers!
Edit: Banefire is one of the five Marvel XP rewards, Winter's Wrath I believe inflicts “Chilled” and “Exposed”, while the Golden P.E.W. Raze will be the mastery reward for Chapter 12. That's all I know for now.