A Traveler in a Black Robe

I recently came across a weird traveler in the Dead Cliff. His behavior was so bizzare that I followed him. Then, he suddenly attacked me. I've never seen anyone that powerful. His weapon was amazing. I really thought I was going to die. Then, he stopped and did not kill me. He said Your memory remains here. I'm clueless about its meaning, but I do remember seeing him doing something in front of a rock. However, I was so terrified by that traveler I don't ever want to go back there again. So, can you go there instead of me? Go to the Ghost Valley and get me The Stuff That Will Wake My Memories from the rock.

I've already told you the story. Now I'm getting impatient. So, go to the rock in Dead Cliff and bring me the Stuff that will wake my memories.

Alas, this is my journal. Why was it there? Ah... I lost it such a long time ago, I forgot about it entirely. I didn't even realize it was missing. Now I've see it again, my mind is racing. I'll read it. Wait there a second. Don't go away.