Mirielle is slowest to respond, which doesn't surprise her. She's been concentrating on the flames in the corner of the barn. Her forehead is already beginning to bead with sweat and her mouth is dry, but she forces herself to push away old memories and focus on the task at hand.
She recognizes the demon that just attacked Jorran, so she calls out to her allies. "That's a wrackspawn. Try not to get hit with its spear, because otherwise there's a good chance of you doubling over in pain." "Try not to get hit with a spear" is probably advice that applies to any circumstance and most don't really need to hear it, but she's still a bit shaken by the fire.
Deciding to deal with the wrackspawn in the quickest way she could think of, she reaches to her belt and pulls out a vial of sand. She steps forward and tosses it, almost gently, at the demon.
Spoiler
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Move action: Draw slumber sand
5-foot step: to L17
Standard action: Throw slumber sand at W. (1d20+4)[8] Fort DC 15 or sleep for 1 minute.