This is part of The Darklands story.
Given their current track record of assailing strongholds and being severely out-manned and out-equipped by Walram's men most of Bhagpuss's suggestions involving combat were immediately thrown out the window, yet the team agreed that they couldn't just in good conscience leave this evil man alone now that they stumbled across his lair. The bishop then had an idea. It was crazy. It was dangerous. They all agreed to it.
The guards must have been surprised to see the group march up right to the castle gate. More so when Bishop Syp requested food and shelter. Walram was so curious that he accepted, letting the team dine with him that evening and giving them a room to spend the night in. And when they slept, he planned to kill them.
Bhagpuss is not one to be caught unawares though, and after waiting for their guards to leave for patrol the group snuck out of their quarters and followed Gypsy Syl quietly to where she figured Walram's private quarters were. The robber knight was alone but still armed. The bishop suggested he surrender, but Walram had other ideas - charging at the team with his two handed sword in a fit of rage.
He easily knocked out the elderly bishop and sent Ravanel to the floor with a well placed kick, making the world go white with pain. When she regained her vision she only saw two figures left standing. It was Bhagpuss and his blade rammed deep into Walram's chest. After a moment, the robber knight collapsed to the floor dead. Beside him lay Gypsy Syl, a fatal wound to the abdomen being her undoing. Ravanel cried as she closed her friend's eyes for the last time.