Kraagor's Tomb's final defence

[factotum]

Or C - Redcloak thinks Xykon is no longer helpful to him. As Redcloak have said before killing Tsukiko, he considers himself the puppet master pulling Xykon's strings because it suits the Dark One's plan. If he would have a better option, he would go for it.

I think Redcloak is far too deep into the sunk cost fallacy to split from Xykon for that reason. If he did so, he would be tacitly admitting that he'd made a mistake joining with him in the first place, and the many goblinoids who have died as a result of that* would have died for nothing.

*

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Including Redcloak's own younger brother, killed at his own hands to prevent him attempting a sneak attack on Xykon.