While there has never been a shortage of demonic forces in the Marvel Universe, none have made as significant an impact as the demonic powerhouse known as Mephisto. Apart from menacing Earth's Mightiest Heroes, the powerful demon has maintained a small but potent stranglehold over a dedicated group of followers throughout the centuries that has become known as the Cult of Mephisto - and Marvel has just set the group up for a gruesome return to the spotlight as they hunt down one of the publisher's most popular (and powerful) heroes.
Source:https://www.cbr.com/ghost-rider-cult-of-mephisto-return-marvel/