The two elves seem exhausted, scared, and more than a little on edge. "What is happening is that everything has gone drow! We have been attacked nonstop by the Mist that Crawls. Moon Wolf took a nasty wound in the initial ambush buying us time to take firing potions. He was fine for a time but then he dropped into a fever and collapsed. We thought it was just some bad luck and that we could handle it, but we eventually realized the Mist is more powerful than it should be. We couldn't risk losing the Mul, so two of us went for help, I am guessing they didn't make it since you didn't run into them."
-Find out how many remain and organize an effective defense. Moon Wolf is down, alive barely, sick or poisoned.
Your Heal Check stabilizes him, you have never run into a poison this intense before, your kit had enough to treat several people and yet it was barely enough to stabilize the Mul. (You think you remember passing the herbs you need just a quarter mile back.)
-Try to assess the threat. [Arcana, Religion, Insight] Very solid rolls, What seems to be attacking the elves are groups of "Mist Spawn" potent monsters but only fragments of the Mists power, You know the creature is a natural beast, fey, shadow. It deals and is resistant to cold damage, it shifts and flows across the field and is hard to pin down. Per the Elves when the mist attacks in full there will likely be several waves, often undead make up the bulk of the forces, but dark fey creatures are common also.
@ Xaal, you keep a good watch, you don't detect any movement or any attack at this time. You do spot a couple of promising brambles and piles of rock that could swing the battle in your favor if you want to spend 5 minutes to prepare the area a bit.
*** The fight is imminent, you have according to the elves, about 5 minutes to prepare (the monsters attacks have been maddeningly predictable). Take this time to try to do anything you can think of to tip the odds in your favor. Ideas that have or will be presented:
* Healing herbs for Moon Wolf, at a dead sprint one of you can run to the herbs, pick them, run back, and heal Moon Wolf for the upcoming fight. [Athletics Check], [Nature or Heal Check], [Endurance Check], [Heal Check]
* Preparing the area for battle, Search for usable terrain/items [Perception], Use either your surroundings or your knowledge of battle tactics to postion yourselves [History/Nature], Drag items around or deftly set up some trip lines [Athletics/Acrobatics], Hide yourself or figure out the likely angle of attack[Stealth/Insight]
If you have any other ideas, figure them out and present them in similar format.