Korrin looks away just in time to see that burning fuse and doesn't hesitate to act when Iron Bull steps in front of her. Barrier is definitely on her mind and Korrin renews the spell for the sake of the others far more than herself, since hers is still strong.

If they're lucky, that will be enough. If not...Taas's idea isn't a bad one, and she gives it a shot. At least there's one ice spell she knows well enough, and the Vashoth mage works on casting it now, hoping to encase the thing in ice before it explodes.