In this particular case it all began with a broker calling himself Virgil Tarikoss. He had contacted some of the lower ranking members of the Seventh Cabal and hinted that he had an assignment that would prove most profitable for all parties involved as well as grant us more power. Having discussed it in the Circle of Tyrants we decided to green-flag the enterprise and see what Tarikoss might be able to give us.
First we had to prove ourselves to him and assault a hideout belonging to the Legacy Chain and break up one of their rituals. Hardly problematic and we cut through the occult fools like a sacrificial knife through the throat of a Thorn victim.
Tarikoss began to reveal the layout of his scheme to us and it required we clash with more minions of the Legacy Chain as well as seek out the Circle of Thorns in their cyclopean lairs. During these raids we began to piece together an idea of what was going on based on information given to us by Tarikoss and - it seemed that in the 18th century, a Jesuit priest called Padre Henri, told about a great demon called Bat'Zul that once dwelt in the volcano after being summoned by desperate cultists. He imprisoned the demon beneath the mountain that gives Cap au Diable it's name and now after it's long imprisonment it was finally breaking loose of it's bond as Dr Aeon's geothermal experiments had accidentally tapped into the fiend drawing tremendous power from it, and weakening the seals that kept it bound.
This last part didn't ring true but Tarikoss insisted this was the way it was. Of course he couldn't have known that I had run a few black-ops for Marshall Brass some time ago, where I had discovered that Dr Aeon was fully aware of what he was doing - there was nothing accidental about his experiments - and that Cap au Diable was actually being powered by demonic energy rather than geothermal power.

But I went along with the games and kept my eyes on Tarikoss. As the whole thing was thundering towards it's conclusion we had to make a surgical strike against a Thorn Coven which were trying to take control of Bat'Zul so that they would direct it when it broke free of it's binding spells.
As we prepared to descend into the dark beneath the mountain, to rebind Bat'Zul and divert part of it's majestic power to ourselves, Tarikoss informed us that the Legacy Chain had beat us to the punch and brought in the Hero Infernal from The City to assist them in binding and neutralizing Bat'Zul.
We clashed with Infernal and his honour guard of Legacy Chain in the entrance to the lair of Bat'Zul - but somehow the Hero didn't seem to be at full strength - something we capitalized on straight away. Having crushed the Hero and his retinue, we continued into the underworld lair of Bat'Zul - the presence of the creature warping the whole place partly out of this world and transforming it into a small slice of the fiery hell from which Bat'Zul had originally crawled.
Needing to break the remaining intact sigils before we could rebind the beast, we waded through a horde of the demon's avatars - giant two-legged creatures that were all hunger and gaping maws .... although I kept getting an urge for KFC-style chicken legs while fighting them for some reason ...

Although the shrieking avatars of Bat'Zul were frightful opponents, they were as children as opposed to the horrid demon when it rose from the lava lake in the middle of its underworld domain - it took all of our resources and powers to fight off the creature. The place had the screams of henchmen, the searing light of radioactive blasts, gunfire and general sounds of combat and suffering added to the already existing cacophony of roaring fire and shrieking demons.
Finally we managed to lure Bat'Zul away from the lava lake - which seemed to rob it of some of it's power - and then in a final ditch effort we managed to bind it once again and topple it into the fiery lake - forever bound!
But we had been deceived! No measure of demonic power came our way and in the end it turned out that Tarikoss had been a Hero masquerading as a broker to lure a bunch of villains to do his bidding and prevent the evil of Bat'Zul from rising - we were apparently going to be sucked into the fiery private hell of Bat'Zul when it was rebound, but fortunately this failed.
If only Tarikoss hadn't managed to escape and leaving us looking like fools - but then again, I have sent word to a few old contacts back in The City - sweet girls working for the Knives of Artemis, and given promise of a sizable bonus if they can locate Tarikoss and deliver him to me either dead or living.
Ah well - I guess we should count ourselves lucky that we managed to stand up to a monstrous creature and come out of it alive and uncooked - evil will have it's way some other day.