Wan-Jun the Great Hammer

Mountain of Imprisonment
Late
Story
2 phases
Difficulty 5/5

Wan-Jun the Great Hammer is a story encounter in Mountain of Imprisonment, fought during the late stretch of Phantom Blade Zero. Beating it hands you Bashpole, which is usually the point: the roster and the arsenal are the same progression system.

Also written as Coppermaul, Wan Jun. Same encounter — launch-week guides spell the name inconsistently.

At a glance

Region	Mountain of Imprisonment
Progression	Late
Type	Story
Phases	2
Drops	Bashpole
Difficulty	5 / 5

What this fight tests

Two problems at once. He fights alongside Red Wraith, and his baby-like form disguises how much ground the mace covers.

How to beat Wan-Jun the Great Hammer

Kill order matters more than damage. Deal with the mobile partner first; the hammer is slow enough to avoid while you do it.
Dust from his swings obscures the follow-up. Move out of the cloud rather than trying to read through it.
The Bashpole drop is a long-reach option — useful against the remaining Mountain of Imprisonment encounters.

The loop underneath all of it is the same one every boss uses: parry the blue flash, Ghoststep the red one, drain Sha-Chi, then punish the stagger with Power Surge. Phase transitions are invulnerable — heal and reposition instead of swinging into them. And dying in a later phase restarts you at that phase, not at the beginning, so you can throw attempts at the hard half.

Hardest difficulty, marketed as an easy method — and it is, because the mace was never the problem. The fast partner is. Target priority decides this one. — via African Gamer on YouTube

What you get

Bashpole. Drops are tied to the kill, and enemies in Phantom Blade Zero do not respawn — so a skipped encounter is a permanently missed weapon in that playthrough. If a build guide tells you to use something you have never seen, the answer is usually an optional fight you walked past.

Upgrades are refundable through reforging, so testing a new drop costs materials and time rather than permanence. See best weapons for where this one ranks.

The mistake most players make

Focusing the big target because it is the obvious threat. The fast one is what actually ends runs.

Where Wan-Jun the Great Hammer sits in the roster

There are at least 50 bosses across six regions, many of them optional. This one is part of the Mountain of Imprisonment block.

Wan-Jun the Great Hammer — quick answers

Where do you fight Wan-Jun the Great Hammer in Phantom Blade Zero?

Mountain of Imprisonment — specifically during the late portion of the game. It is a required story encounter, so you cannot progress past it without winning.

What does Wan-Jun the Great Hammer drop?

Bashpole. Weapon and Phantom Edge drops come from clearing the encounter, and enemies do not respawn — if you skip this fight, there is no farming route to recover the item later in the same playthrough.

How hard is Wan-Jun the Great Hammer?

We rate it 5 out of 5 relative to the rest of the roster. It sits at the top of the difficulty curve and is where many players stall. Nothing in the game is gated behind difficulty, including trophies.