Rosa eviscerates the last cultist handily between her claws and fangs. Hesper moves to the desecrated temple to line up a shot. Irabeth makes her way there as well, and tries to push past the tiefling bomber. She is rebuffed and forced to remain back. Hesper's shot hits but is turned aside by his toughened hide, whereas Skerak can't line up a good shot.

Shauna charges, and her blade bites through. It comes out of the tiefling's flesh dripping with red blood. As she enters the temple, she sees a conspicuous glowing square outline in the wall near the altar. The tiefling steps back and mixes another bomb. He throws it at Rosa, to catch as many as he can.

Spoiler: OOC
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(1d20+7)[9] Bomb attack
(3d6+2)[14] bomb damage.
Everyone in the splash zone needs Ref DC 14. 5 damage, Ref half.