Sorrowsworn encounter and the loss of the commander

It has been a couple of weeks since on the trail of those ghouls with the reports of all the bodies and disturbed graves it made sense, we followed the route to a lava tube near the village of kirkfaern. The commander from the school of the bull and the person who hired me, Cassius, lead us through the lava tube accompanied by other people, krea a slayer from the school of the leopard she seemed like a nice and incredibly strong and brave woman, Althalos a fighter like me I assume didn’t talk to him much….I do wonder what he was like…..there was also Tavrith a skittish black dragonborn from the school of the raven and he showed he was truly a great magician from what I saw in our journey together. The main group though were the three new adventurers: a joyful, tricky cat person, named josephi that cast arcane spells through the use of tarot cards (must attempt to research this) a strong cleric, lava humanoid named Josiah, and a perceptive, resourceful half-elf woman named Daphne. We reached the lava tube and immediately something felt strange there were many bodies with holes in their chests they appeared mummified as if the life was sucked out of them, this immediately struck us strange as ghouls aren’t lair creatures nor do they consume their preys in such a way I was almost sure at that point that we weren’t chasing ghouls and my chest tightened and I have felt a great feeling of despair and at that moment as if in a reflex I was sent back to a distant memory. I was back in the lair being seen off by my teachers it was a beautiful memory gods how I missed them especially lady Daemoira but with that memory, I remembered her look one that took away all hope of a mutual relationship, gods she is truly beautiful and it saddens me that she might never see me the same way but I am still honored to be her student and master….oh how heavy my heart was leaving him…..I sure do hope I see him again please gods let me see him again let that hug not be our final one. After I snapped back, we faced a great monster of hollow and gaunt stature but still giant size, a sorrowsworn, we fought him and almost lost until we learned about its weakness to light which we used well, Josiah dealing the final blow on it, but we lost athalon and the commander and we saved krea from death, but she was still in some sort of coma and is still as the day ends. In the battle something happened I was able to heal Josiah as he fell I don’t how I did it, I fear it has to do with my dreams I hope I could find some help in this field but for now, I should probably keep it a secret. We also found an altar with a symbol giving a possible reason to how the sorrowsworn came to our realm, there was also a burnt piece of paper that had some writing about a trail, I feel like it was a coverup we should probably follow this trail further I also sketched the symbol so I could show to someone later.