How to beat The Gold-Masked One in Phantom Blade Zero

The Gold-Masked One in Phantom Blade Zero's Long Pillar challenge can only be damaged after a parry, a perfect dodge, or when his Sha-Chi is broken, so regular attacks do nothing. Counter his blue and red attacks to deplete his Sha-Chi, then deal as much damage as possible, ideally with Jagged Steel for bleed. The reward is the Counterstrike Bracers, which increase damage dealt by 20% for two seconds after a parry.