Johns' best story with the Imp was probably "Stealing Thunder" where the Ultra-Humanite put his brain into Johnny Thunder so that he could steal the pen from Jakeem. So I'll call it now -- the season ends with Brainwave defeated, but his consciousness goes into Mike and he uses him to get the pen and take over America. Leading into season 2 where the heroes have to band together to win back America.
Nah, sounds too complicated.
Any rules with the use of the Imp in the pen, as in certain things cannot do?