Zanshin Herb Case in ZZZ: My 2026 Look at Harumasa’s Signature W-Engine

I’ve been testing the Zanshin Herb Case on and off since its Version 3.1 Phase 2 rerun ended, and in 2026 it still feels like one of the most purpose-built Attack W-Engines in Zenless Zone Zero. It is an S-rank W-Engine, it is Harumasa’s signature weapon, and it is designed to push Electric Attack Agents toward a very specific playstyle: mono-Electric teams with a Stun Agent. As a player who enjoys dash-heavy combat, I wanted to put together a clear, practical breakdown of what this W-Engine does, who should use it, how to get it now, and what it costs to ascend.

Stats and effects: a dash-focused Electric Attack tool

The Zanshin Herb Case is not a generalist stat stick. It is an Attack W-Engine, and its overclock effect is tailored to Electric Attack Agents who spend time in Dash Attack windows. From my testing, the appeal is straightforward: you get the high offensive ceiling you expect from an S-rank Attack engine, plus a bonus that specifically raises Dash Attack Electric DMG. That makes it feel less like a universal upgrade and more like a precision instrument.

I would summarize its identity like this:

Category	Details
Rarity	S
Type	Attack
Element focus	Electric
Signature Agent	Harumasa
Team preference	Mono-Electric with a Stun Agent
Key effect	Increases Dash Attack Electric DMG, alongside other overclock benefits
Acquisition	Exclusive S-Rank banner; not available elsewhere

Because the effect leans toward Dash Attacks, I find it rewards players who already understand Harumasa’s movement and burst patterns. If you are just swapping it onto any Attack character and expecting the same result, you will probably be underwhelmed. It wants an Electric attacker who can weave dashes into damage windows.

Best characters: Harumasa first, Soldier 0-Anby second

The recommended list is short, and that is a good thing. The Zanshin Herb Case is Harumasa’s signature weapon, which makes him the primary and most recommended user. In my view, it is his best-in-slot option: the W-Engine and his kit are clearly designed to complement each other, and the Dash Attack Electric DMG boost fits his damage profile better than a generic Attack engine would.

Here is how I rank the users:

1. Harumasa — the signature owner and the clear best-in-slot. If you main him, this is the engine you want.

2. Soldier 0-Anby — the next most recommended option. She can take advantage of the Electric Attack focus and the dash-oriented bonus.

3. Other Electric Attack Agents — they can still benefit from the Dash Attack Electric DMG increase and the other overclock effects, but I would treat this as a fallback rather than a perfect fit.

I also want to stress the team requirement. The Zanshin Herb Case works best in a mono-Electric team with a Stun Agent. In practice, that means I want my support and stun slots to reinforce Electric damage and create stun windows for my Attack Agent. The W-Engine does not fix a messy team; it rewards a focused one.

How to get it in 2026

This is the part that requires patience. The Zanshin Herb Case had its latest rerun banner in Phase 2 of Version 3.1, and that banner has since ended. Because it is an exclusive S-Rank W-Engine, Proxies cannot get it anywhere else. I have seen players ask whether it is on the standard pool or a permanent shop, and the answer is no. For now, the only realistic path is to wait for another rerun.

That does not mean the engine is gone forever. A future rerun might occur, so I would keep an eye on official banner schedules and save Polychromes if Harumasa is part of your long-term plans. As of 2026, my advice is simple: do not chase it outside its banner, and do not assume it will appear in a random pull.

Ascension materials and investment

Ascending an S-rank W-Engine is never cheap, and the Zanshin Herb Case is no exception. The materials are split across ascension levels, and the exact per-level spread is shown in the chart below. I usually pre-farm the tiered W-Engine components and Dennies before a rerun so I can level the engine immediately if I pull it.

From my experience, the important thing is not memorizing every count but planning the tiers. You will need lower-tier components first, then higher-tier components as the ascension level rises, plus a significant amount of Dennies. If you are building Harumasa from scratch, I would budget for both the W-Engine and his Agent ascension at the same time, because splitting resources halfway can leave you with an engine that feels unfinished.

My final take

The Zanshin Herb Case is a specialist’s W-Engine. It is not the first pick for every Attack Agent, and it is not a universal account upgrade. But for Harumasa, it is the signature choice for a reason, and for Soldier 0-Anby it is a strong alternative. The mono-Electric plus Stun team requirement is real, and the Dash Attack Electric DMG focus means you should commit to that playstyle.

If you already have Harumasa and missed the 3.1 Phase 2 rerun, I would save for the next opportunity rather than settle for a generic engine. That is what I am doing in 2026: waiting, pre-farming, and keeping the Zanshin Herb Case on my wishlist. 🎯