These dark and supple boots are made from the hide of a powerful Beastman hunter.
Some of what the Beast possessed in life endures in death, which has been augmented by runes pertaining to the Archon of Shadows. In addition to Bleden Mark's name, less recognizable sigils seem to glow with power, though fall short of disrupting the darkness.
One familiar rune corresponds to the name of an Archon of Shadows who was a purported Beastwoman herself - a peerless stalker and trapper who eschewed human civilization and lived for untold centuries. It was said that she moved from one wilderness to the next, working her way through the local prey until she was the uncontested Alpha, and would then move on - intent on becoming the dominion over all nature.
Whether Kyros proved her wrong or she still lurks in the wilderness is a matter of speculation.