Pwned: Aeternae Memori 1.8 Clyde Rework Showcase (Secret Boss Spoilers)

I know I've already done a video beating this boss with Clyde before in the PBT but a few things have changed since then and that video was a poor showcase of Clyde's abilities. This video is just a demonstration of the newly reworked Clyde's capabilities without any memoirs unlocked.
Stat distribution:
Level: 265
Health: 25
Attack :159
Stamina: 30
Critical: 10
Sturdiness: 30
Defense Rating: 10
Weapon: Chained Seal Strike +125
Trophy: Pierced by Arrows 2
Gems: HP Increase +5, ATK Increase +5, Parry Window Increase +5
Skill Chains:
Bouncing Darts, Crimsonshots
Silent Leap, Crimsonshots, Blade Call
Blade Call, Silent Leap, Bouncing Darts

[@xxlilslimtimmyxx2813]

what did u put in skill editor?

[@Cripster21]

I've often heard about the secret boss :0 but how to open it XD

[@aviaretubbs2340]

Look in hero mode chapter 0 act 2. That's all I'll say.

[@ExecutionGOC]

How do i get this secret hero 0-1 to face this guy ?