Bentley: It's a semi-magical device that sucks up bad mojo. I'll need it to gather the run off from these spouts.
Use the crypt traps to keep the wolves at bay while you collect bad mojo, we'll need it to blow the Clockwerk Eyes off the Mindshuffler.
Bentley has found a bad mojo collector, which is a semi-magical device that absorbs bad mojo. He needs to use this to gather mojo that runs off from the spouts on the ceiling. If he gathers a full tank of bad mojo, it should be enough to destroy the mind shuffler.
In order to destroy the Mindshuffler, Bentley needed to collect some bad mojo from four of the The Contessa's crypts. To collect it, Bentley must take out all the guards, using switches, that activated nearby traps. After the cylinder was full, it contained enough black magic to destroy the Mindshuffler.