Oh sure, out sight.. out of mind...,

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I agree, let the bear and the giant ninja have at the remaining bugs. Ulthok can wait. Being at the top of stair, doubled over, he might catch a glimps of the glow down by the parties stuff.
Maybe Kenji can kick the the dead bug over Cor and set him free. Or maybe just pick it up and throw it at the other bugs.
I'm not sure what Ulthok can do if he does see the glow.
good going gang, we may servive yet.