Sekiro Shadows Die Twice - Final Boss, no hud, sword only

Final boss of Sekiro done with no items, no sword skills, no prosthetic taking no direct hits or damage. Hud is disabled for some extra pazazz. Also sparing the him in the end because he does not deserve an honorable execution. No additional damage increases from dragon mask. took the nondamaging knockback at phase 2-3 transition and I've been told lightning does a little damage even when reflecting it