Mycah and Artanis stand near the tunnel's far end, clearly with different ideas about what to do next.
Everyone else remains below, waiting for the scout to tie off and drop the rope, unless they decide to climb the hand holds. Artanis reaches for his oil as the young scout steps past him.
Mycah moves swiftly in response to the sound, slipping into the shadow in the doorway. His first foot into the room nearly slips out from under him, the ground around the doorway was slick with oil. Mycah could spy an upturned table in the corner, a man hiding behind it, torch in hand. He peeks around the edge of his table, but fails to see the scout hiding in the doorway.
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Both thief skill checks successful under the circumstances.
We're not quite in combat rounds, but this is happening fast.