The Maleficient Guild is the ultimate in difficulty for Conflux. Each champion starts 1 health point and 1's for all stats. If you bump a wall you die. You need to resurrect or re-incarnate all four members of the guild in order to get the Bone Doll. Choosing to re-incarnate will allow you to name your Champions otherwise all Champions will be named Curse of the Poltergiest. The Bone Doll, the Spiritual Guide for Damned Souls, will sing for the party at certain locations. In addition to its 'pray' ability, an Adept Priest will be able to use the Bone Doll to 'banish' non-material beings.
It's highly recommended that you have played Conflux through unlocking of the Guilds before attempting the Malefiecient Guild.