WUCHANG: Fallen Feathers Impetus Repository Guide — Skill Tree Explained

What Is the Impetus Repository?

The Impetus Repository is Wuchang’s skill tree system. It’s where you spend Red Mercury Essence to unlock Disciplines — passive abilities and active skills that define your build. Every upgrade you care about lives here: weapon-specific techniques, spell buffs, flask charges, Temperance uses, and defensive passives.

Here’s what you need to know upfront: the Impetus Repository is fully respecable at any time with no penalty. You can dump everything into Axes, decide you hate axes, pull all your points out, and reinvest into Longsword Disciplines without losing a single point of Red Mercury Essence. This changes everything about how you should approach the system.

The 6 Branches

The Impetus Repository has six branches. One general tree and five weapon-specific trees.

1. General Tree

This is the only branch every build needs. It contains:

• Flask charges — Additional Manna Vase uses. More healing per rest. The single most universally useful investment in the entire Repository.
• Temperance uses — More armor enhancement activations. Useful before boss fights and dangerous areas.
• Health nodes — Flat health increases. Straightforward survivability.
• General utility — Various passive improvements that benefit all builds.

Investment priority: Get extra flask charges first. They save more runs than any other investment. Then Temperance uses. Then health nodes.

2. Longsword Tree

Contains the Sword Counter line (Deflect stance, Deflect timing improvements, Sword Saint counter-damage) and Crescent Arc (offensive Discipline). This tree makes or breaks the Longsword build — without Sword Counter, longswords have no identity.

Key nodes: Sword Counter → Sword Counter Variant II → Sword Saint → Crescent Arc

3. Spear Tree

Focuses on weapon skills (Steam Chain, Unstoppable Force) and poise damage. The Spear tree improves your repositioning tools and heavy attack effectiveness.

Key nodes: Steam Chain → Unstoppable Force → Poise damage improvements

4. One-Handed Sword Tree

Weapon skills and Skyborn Might generation. This tree bridges into spell-related nodes that boost Magic Attack and spell potency. It’s the foundation of the magic caster build.

Key nodes: Skyborn Might generation → Magic Attack improvements → Weapon skill enhancements

5. Dual Blades Tree

The Blademaster line for combo extensions, Clash mechanic, and poise-breaking heavy attacks. This tree turns Dual Blades from fast-but-fragile into a sustained aggression machine.

Key nodes: Clash → Blademaster combo extensions → Poise-breaking heavies

6. Axe Tree

Rampage (lifesteal), Axe & Hook (Clash), Chop & Weave (combo extension with Clash frames), and Earthshatter (poise breaking). This tree is the reason Axes are the best weapon type — every node reinforces the aggressive lifesteal playstyle.

Key nodes: Rampage Variant I → Axe & Hook → Chop & Weave → Earthshatter

Red Mercury: The Currency

Red Mercury is the raw resource you collect from enemies, exploration, and certain item drops. On its own, Red Mercury can’t be spent in the Impetus Repository. You need to refine it into Red Mercury Essence at Shrines (Wuchang’s bonfire equivalent).

How to refine: Visit any Shrine and select the refinement option. Your accumulated Red Mercury converts into Red Mercury Essence, which you can then spend on Disciplines.

Farming Red Mercury: You don’t need to grind. Normal progression through the game gives you enough Red Mercury to fill out your primary weapon tree and the general tree comfortably by endgame. If you want to fill a second weapon tree, you might need to replay some areas, but it’s not a significant grind.

New Game Plus: You keep all your Impetus Repository progress. By mid-NG+, you’ll have enough Essence to fill three or four complete branches.

Investment Priority (First Playthrough)

Here’s the order I recommend for a first playthrough, regardless of weapon choice:

Phase 1 — Early Game (Chapters 1-2):

1. Your primary weapon tree’s defining skill (Rampage for Axe, Sword Counter for Longsword, Clash for Dual Blades, Steam Chain for Spear, Magic Attack nodes for One-Handed Sword)
2. General tree: first flask charge upgrade
3. Your weapon’s second-priority skill

Phase 2 — Mid Game (Chapter 3):

1. Continue filling your primary weapon tree
2. General tree: second flask charge upgrade + first Temperance upgrade
3. Health nodes in the general tree

Phase 3 — Late Game (Chapters 4-5):

1. Complete your primary weapon tree
2. Fill out remaining general tree nodes
3. Start a secondary weapon tree if desired

Phase 4 — Endgame / NG+:

1. Fill secondary weapon tree
2. Start a third weapon tree for specific boss matchups
3. Grab any remaining utility nodes

Respec Strategy

Since respeccing is free and instant, you should respec aggressively. Here’s when:

• Before a boss that counters your build: If a boss has heavy AoE that shuts down your Dual Blades Clash build, respec into Spear or Longsword for that fight, then respec back afterward.
• When you find a weapon you like better: No sunk cost. Pull your points and try the new thing.
• When you hit a wall: Sometimes the answer to a difficult section isn’t “get better” — it’s “change your approach.” Respec into a different build and try again.
• In New Game Plus: Experiment freely. You have enough Essence for multiple full builds.

The no-penalty respec is one of Wuchang’s best design decisions. Use it without guilt.

Common Mistakes

Spreading investments too thin: Don’t put a few points into every tree. Pick one weapon and the general tree. Depth beats breadth on a first playthrough.

Skipping flask charges: I see players rush weapon damage nodes while ignoring flask upgrades. Extra healing saves more runs than slightly higher damage. Always.

Forgetting to refine Red Mercury: Red Mercury sitting in your inventory does nothing. Refine it at every Shrine visit. There’s no reason to hold onto raw Mercury.

Hoarding Red Mercury Essence: Unspent Essence is wasted potential. Since you can respec freely, there’s zero reason to save points “for later.” Spend everything. If it turns out to be the wrong choice, respec and redirect.

Ignoring the general tree: Some players hyperfocus on their weapon tree and neglect the general tree entirely. The general tree’s flask charges and Temperance uses provide more survival value than most weapon Discipline upgrades. Balance your investment.

Discipline vs. Weapon Mastery

Don’t confuse Impetus Repository Disciplines with Weapon Mastery upgrades. They’re separate systems:

• Disciplines (Impetus Repository) = Skills and passive abilities, bought with Red Mercury Essence
• Weapon Mastery (upgrade level) = Raw damage increase for a weapon type, upgraded with Red Feather materials

Both apply to entire weapon types, not individual weapons. But they’re upgraded through different resources and different menus. Make sure you’re investing in both.

Final Thoughts

The Impetus Repository is the backbone of your build. Your weapon choice sets the direction, but the Repository determines how well that choice performs. Prioritize your primary weapon tree’s core skills and the general tree’s flask charges, spend freely because respec is free, and don’t forget to refine your Red Mercury at Shrines.

The system is more forgiving than it looks. The worst thing you can do is leave points unspent. Experiment, invest, and respec when needed. That’s exactly how it was designed to work.