[Zhanshen fanfic + two male protagonists + king Miyamoto Musashi + gods + Cthulhu + abstraction]
The 144th weakening turned into nothingness, causing Miyamoto Musashi at his peak to break through the dimensional wall and come to Takamagahara in the world of God-Slayer. He unexpectedly became Susano'o's agent. With the ultimate Yin mechanism and the identity of a god's agent, he felt a glimmer of hope in Lin Qiye to resurrect Atong... So he resolutely joined the night watch to accompany Lin Qiye. During this period, he relied on powerful mechanisms and chance to change the regrets in the world of God-Zlayer.
…
That day when the gods came to Daxia, Miyamoto Musashi and Lin Qiye stood on the opposite side of the gods. Behind them were the lights of thousands of houses in Daxia. As [the sternest father of the gods] Miyamoto Musashi just clenched his swords and said with a chuckle: "In the summer of 2020, even the gods had to give in when they met me!"