"I would pray to the Great Camazotz, in order to gain insight into our situation. The world above, which will affect our world below, is in peril, and if it is a great death to his followers..." Kyornor says as he lets last bit trail off as he puts his weapon away and supplicates himself before the drider.

Spoiler
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Not sure if you want any particular roll as he isn't being duplicitous.

Sense Motive
(1d20+4)[18]