Swordgrandmaster: He has mastered all sword style possible
Characterization: Weak But Clever & Determined Protagonist
Ordinary Human: At the start, 自分 has no powers at all
But at the end,: 自分 dies & is reborn w/ Divine Power
Divine Power: Fully transcends 相手 w/ enlightenment
By emmiting immense [Will of Defiance] from his sword, 自分 funnels all probability into 自分's victory, breaking the barrier of cosmic improbability (自分's just an ordinary human) through sheer willpower
At the end, when 相手 destroys 自分's body, 自分 gains an enlightenment: "The Absence of Nothing is The Cause of Existence"
W/ that, 自分 transcends 相手, creating a new body to perfectly counter 相手