Demonic Control

"Demonic control? Well, that must've been behind this on turning all The Devil's former debtors into once again debtors of him... but at least Cala Maria's the one former debtor of his own who ain't bein' turned into his minion. Now that she's ready to do this job to help Cuphead, Mugman, the Preschool Girls and me to break them free and save Inkwell Isle once again, it's time to show these guys that their gone-off-to-defend thing couldn't miss them for the world."

--Su Ji-Hoon, Welcome to Inkwell Isle

The Demonic Control is the control ability of Eeofol that it will be used to control all The Devil's former debtors (except for Cala Maria) that it will be only used by The Devil,demons,Kreegans and Eeofol.

Maybe it will be happened in during Demonic War that they controlled all The Devil's former debtors to defend Eeofol from the Grand Alliance and the Unified Capitalist Revolutionary Dictatorship.