R3T20: Arsenne says to Thikha'Nessn "Stay with us friend ...." and he shifts toward the window, and strikes with a flattened palm to try and damage the tentacle wrapped around the neck of Thikha'Ness while shouting "Assassin-bug, spear-hand!"
Spoiler: Arsenne
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But then Arsenne notices that his palm struck just the side of the building. There is no tentacle, no hand, no assassin-bug or any creature. There is no creature around, just an unmoving Thickness.

R3T19: Roran, what do you do?