: The primary fix addressed an error in update 1.03 where the Blazing Bull’s Vitality and Posture were not set to the intended levels. In some cases, the boss had effectively "infinite" health, making the fight unintentionally long and difficult for the game's pacing.
For an educational paper on game patching mechanics (using a legally owned copy of Sekiro on PC), you could discuss: Sekiro Shadows Die Twice Update v1 04-CODEX
While later updates (like v1.06) eventually added the "Reflection of Strength" boss-rush mode, v1.04 was the "polishing" patch. It ensured that the game felt fair and that the "dance" of swords was as fluid as possible. For many, this was the version that truly perfected the game's difficulty curve. : The primary fix addressed an error in update 1