However, this world has many magics, and if acted quickly enough, it might be possible to revive her. In the meantime, what do the rest of you do now?
Nope, false alarm. Looks like Y'all never finished a short or long rest after Quentin used his Inspiring Leader Feat to grant 3 extra hit points. So, that means that Asherah had 12 hit points, and 12-20 = -8. (20 is the average damage, which is what I was going to use until I saw it would be an instakill).
So, Asherah is currently bleeding out, and barely missed having her spine severed by the creature's claws.
Way to go Quentin.