Due to Adrian forcefully opening the temporal rift, it was not stable enough and showed him details of the past. He saw a vision of a hooded individual helping Chidaide in obtaining the Soul Reflecting Mirror that is sealed inside what looked like a Shinto shrine.
He also saw Chidaide forcefully bonding with the Psyche Armament because it kept rejecting him. Chidaide finally managed to bond with the Psyche Armament but he needed to fuse it with his soul which should not be the case.
The Psyche Armament should be an extension of the soul in order to perfectly utilize it. The way that Chidaide used his soul as an anchor is just sloppy and the results is clear as he died after the mirror dimension broke.
