Axile:
Spoiler
something bumps into you before you move, nearly knocking you flat. The giant iron door proves too hard for you to move.
Darkvisionators:
Spoiler
You can clearly see Axile wander off to the door and Mariel head for Firias voice as well as a spray of blood from Firias back, with no apparent cause.
Firia:
Spoiler
Something very blade-like cuts across your back. Forcing you to concentrate or lose your spell.
Spoiler
14 damage, one of your first level spell slots vanishes
everyone else:
Spoiler
hears a slicing sound