This one's hard to tell if he/she is overpowered or underpowered D:

I don't know what to think about the rest of him, but since his ability only lasts until the end of his turn, he'll switch back to his old 8 wounds and 0 armor self for the entire overlord's turn. Since he's worth a whopping 4 CT that'll make him a very prime target that the overlord will be able to harvest for large amounts of conquest.

It's not at all clear how that ability works:

• What happens to current wounds/fatigue? What happens to them when you revert?
• How is equipment affected, if at all?
• How are skills affected, if at all?
• What about cards that are exhausted, or items that are consumed?
• What about effect tokens?

Yeah I figured this one would raise way too many questions, I'll just consider him/her a failed experiment lol