Chyndym's fate

The knight Chyndym kept a journal in which he kept detailed notes in his endeavors. Not wishing for the knight to be lost to history, Guilbert sent a troop of fortress knights and highly accomplished mages to find what happened to the knight and finish his task. This operation was spearheaded by Valing Rogers. While the operation was a success, an unseen force resulted in the loss of many of the mages. The only trace of the party that was found was Chyndym's journal. Most of the pages had be either torn out or damaged. Recorded below is all that could be found about his disappearance.
"Today is the first day of the expedition. None of the scouts returned but now we know we are heading into dangerous territory."
"Expedition day 3. Something is following us, but it's not making any hostile moves. For now we are ignoring it."
"Expedition day 4. Velren fired at what was following us. While I don't think it was the wisest decision, it doesn't seem to be following us anymore."
"Expedition day 5. Velren must've ran of in the night during his watch. The thing is back, but is now following us much closer now. We are going to do double watches now."
"Expedition day 7. I set Selreth and Neyar as the final watch of the night, but both have disappeared. Our forward scouts haven't returned for three days now. I believe we have gotten lost here."
"Expedition day 10. Our losses are to great, we are heading back now. The thing following us is definitely hostile and is picking everyone not wearing metal armor off at every moment it can."
"Expedition day 13. I'm the only one left. I can't trust any shadow and turn at every noise. I don't believe I will survive."
"Expedition day 15. It's small. It's fast. It fears armor. It cries blood, and it stole the dragons journal."
The end of the final line is hastily written.