Blood Oath Dagger: Phantom Blade Zero Material Guide

What Is the Blood Oath Dagger in Phantom Blade Zero?

First, the clarification that saves you an inventory search: the Blood Oath Dagger is not a weapon. Despite the name, it never enters a weapon slot and has no moveset — it is a Soul Tempering material whose entire purpose is unlocking Rapid Charge on the Dread Axe Phantom Edge. If a search brought you here expecting a new dagger to equip, this is the page that explains what the item actually is; if you are hunting temper materials, the Soul Temper materials index logs every one of them.

What Does the Blood Oath Dagger Do?

Hand the dagger to Myst’s Soul Temper menu and the Dread Axe gains Rapid Charge, verbatim from Game8’s Dread Axe data:

Increases charge speed by 30%.

Thirty percent is a bigger number than it looks. The Dread Axe’s identity is its two-stage charged cleave — hold R2, commit, release — and every stage of that wind-up is a window where you can be hit out of the swing. Rapid Charge compresses those windows across the whole kit: the standing charge, the Rushing Axe running charge from level 4, and the Full-Power Charge double-tap all wind up nearly a third faster. PC Gamer describes the same upgrade as improving the axe’s charge-up speed, and the practical effect — per the upgrade text — is that the weapon’s one complaint, slow commitment, largely disappears.

How to Get It: The Four Fierce Axes Tale

The Blood Oath Dagger is the reward for Four Fierce Axes, a tale that runs from the first region to the fourth. Game8’s walkthrough and PC Gamer’s guide agree on the shape of it:

1. Pick up the first case file beside the Broken Puppet Valley bell in Weeping Creek Valley — a book on the ground starts the tale.
2. Defeat Peng Meng, the Axemaster — the fourth case file and the Dread Axe itself drop from the boss fight at the Outpost. The Peng Meng boss guide has the duel covered.
3. Collect the remaining files scattered across Weeping Creek Valley. Game8 counts seven files total; PC Gamer’s count differs (it describes seven files beyond the first and Peng Meng’s), so treat Game8’s total as the working number and note the disagreement.
4. One file only becomes reachable after reaching the Village of Lu — the tale deliberately sends you back to region one late, so do not assume an early sweep finishes it. The missable side quests guide tracks these long-chain errands.
5. With all files in hand, push the story to Pangzhen and reach the Pavilion of Knowledge Crossroads bell.

The Rooftop Handoff

The turn-in is a small dungeon in itself. From the Pavilion of Knowledge Crossroads, per Game8 and PC Gamer:

1. Enter the marked tower — GameRadar routes from the Huang Manor Crossroads bell, but Game8 and PC Gamer both anchor at the Pavilion of Knowledge Crossroads, and the majority is treated as correct.
2. Fight through three floors of Shadow Order soldiers inside.
3. The last enemy drops the Pavilion of Knowledge Rooftop Key.
4. Unlock the top-floor door and step onto the roof, where the Child of Insight waits.
5. Hand over the Axemaster Relic when prompted. The tale completes and the Blood Oath Dagger is yours.

The dagger’s card names its use plainly — it Soul Tempers the Dread Axe — so there is no mystery shopping step after the handoff.

How to Use It

Soul Tempering unlocks once you meet Myst in the Order’s underground tavern during Chapter 4 — which, conveniently, is the same Pangzhen stretch where this tale concludes. At any Bell: Upgrade Equipment, Soul Temper tab, select the Dread Axe, confirm Blood Oath Dagger ×1 plus 5,000 Remnant Dust. The temper is permanent; a Reforge Talisman refunds upgrades but never tempers, so commit with intent. Full rules live in the Soul Tempering system guide.

The Verdict

Four Fierce Axes is one of the best effort-to-reward ratios in Phantom Blade Zero: a handful of collectible pickups, one early boss you fight anyway, and a short tower climb buy a permanent 30% charge-speed upgrade for the shield-breaking Edge most players keep on their bar for the whole game. Start the tale the moment you see the book by the bell, and let the files accumulate as you play. If you are also chasing the Armybreaker soul temper this week, both errands pay out in the same Pangzhen visit.

FAQ

Is the Blood Oath Dagger a weapon in Phantom Blade Zero? No — it is a Soul Tempering material. It never equips; its only function is tempering the Dread Axe, and it waits in your materials until you spend it.

What does the Blood Oath Dagger do? It unlocks Rapid Charge on the Dread Axe, increasing charge speed by 30% — compressing the wind-up of every charged cleave in the weapon’s kit.

How do you get the Blood Oath Dagger? Finish the Four Fierce Axes tale: collect all seven Four Axes Case Files (one beside the Broken Puppet Valley bell, one from Peng Meng), then deliver them to the Child of Insight on the Pavilion of Knowledge rooftop in Pangzhen.

Can you miss the Blood Oath Dagger? No confirmed point of no return — the files persist and the Child of Insight waits. The only gate is story progress: you cannot turn in before reaching Pangzhen.

Sources

• Game8 — Four Fierce Axes Walkthrough and Rewards
• Game8 — How to Get Dread Axe
• PC Gamer — How to complete Four Fierce Axes in Phantom Blade Zero
• GameRant — Every Soul Tempering Material Location
• GamesRadar — How to complete the Four Fierce Axes quest

Case-file count: Game8 states seven total; PC Gamer’s wording implies a larger set — Game8 treated as working total, disagreement noted. No-confirmed-missability is an absence-of-evidence claim, not a verified one; if a point of no return is found it will be patched in.