Faerydae is safe from what happens. I will need a saving throw vs reflex from everyone. I will also need the hitpoints of the Psi Crystal and what it can withstand. Once everyone has posted their saving throws I will explain what happens.
Ildrahil you are safe too.
On the stone door was a arcane explosive rune that the psicrystal read and activated. The result was a explosion that was funneled in a confined space (The small corridor you were in. With Lukas, Krusten and Mr Fluffles they were able to avoid part of the blast (They saved) The rest took the full force of the blast. Thus Zork, Avan, the psicrystal, Champ and Albrecht take the full 26 points of damage. Mr Fluffles, and Krusten take 13 points damage. Lukas takes 13 damage from the explosion and then he needs to make intelligence save due to his crystal exploding or lose 1d4 intelligence. This is due to the psionic connection you had with your crystal at the time of its destruction.
Faerydae and Ildrahil you hear a muffled explosion.
Edited: KNtoran on 5th Feb, 2017 - 4:07am
It is two rounds after the blast when Faerydae gets there to start helping everyone. Since the blast was not flame or blades you are not bleeding out. You all stabilize after the initial blast since it was concussion damage. Those under 0 I go by the constitution score of how low you can go before dead or -10 which ever is the lower number. Thus a constitution score of 15 the character can go to -15 before death. Everyone can add 1 HP since Faerydae assists them.
Iladril you hear some laughter coming from up the cave. Looking that way you can see a soft glow of a light.
Edited: KNtoran on 6th Feb, 2017 - 2:52pm
When Krusten looks into the hallway she sees it half full of dust from the spell. She can see the stone is still there but it does look a bit different now. She sees no movement between her and the stone. She sets about dragging the bodies of her companions back into the open area behind the waterfall. Mr Fluffles seeing that Faerydae is following him runs back into the cave and goes over to Avan's pack and begins to dig through it until it finds the scrolls. It grabs one and drags it out and over to Faerydae. He meows at her and then looks to the scroll.