I’ll be honest: when I first saw Grill O’Wisp, I thought it was just another A-rank W-Engine with a funny name. Then I read the effect—CRIT Rate on HP loss—and realized it’s basically a love letter to Rupture agents who like playing dangerously. As of 2026, that niche is bigger than ever, and Grill O’Wisp has quietly become one of those engines I actually check before I write off an A-rank option. Is it a universal must-pull? No. Is it the right answer for a specific kind of agent? Absolutely.
What Grill O’Wisp Actually Does
Grill O’Wisp is an A-rank W-Engine in Zenless Zone Zero. Its headline effect is a massive CRIT Rate boost that turns on when the equipper’s HP decreases. That’s the whole trick, and it’s a good one. Rupture agents already want to mix it up, and many of them can manipulate their own HP or take consistent damage as part of their kit. Grill O’Wisp takes that downside and converts it into crit consistency.
Here’s the catch: you can’t just slap this on any attack agent and call it a day. If your DPS never loses HP, the engine’s main selling point is asleep. I learned that the hard way in a test run—my crits looked fine on paper, but the moment I switched to an agent who actually drops HP on purpose, the difference was obvious. Why would you spend an A-rank slot on a conditional buff if you never meet the condition?
| Detail | What I Know |
|---|---|
| Rarity | A-rank W-Engine |
| Signature Agent | Manato |
| Core Effect | CRIT Rate boost when the equipper’s HP decreases |
| Best Role | Rupture agents with HP manipulation or consistent self-damage |
| Acquisition | Standard Banner, Exclusive W-Engine Banners, Exclusive Character Banners |
Best Characters for Grill O’Wisp
The short list is simple: Manato first, Banyue second, Yixuan as a very viable option if she’s taking consistent DMG. That’s not me guessing—Manato is the signature agent, so the kit synergy is baked in. Banyue also makes sense because the engine rewards the exact HP-loss playstyle Rupture wants. Yixuan is the flex pick; she can use it well, but I’d only do it if her team actually keeps her HP moving. Otherwise, you’re paying for a buff you’re not triggering.
Here’s how I’d rank them:
| Rank | Agent | Why It Works |
|---|---|---|
| 🥇 | Manato | Signature W-Engine; the HP-loss condition fits his kit naturally |
| 🥈 | Banyue | Rupture agent who can turn HP loss into value |
| 🥉 | Yixuan | Viable if she takes consistent DMG; not a blind slot |
I’d also say this: don’t force Grill O’Wisp onto a crit DPS who has no self-damage. It feels bad. The engine is not a stat stick. It’s a conditional crit engine, and conditions matter.
How to Get Grill O’Wisp
You can pull Grill O’Wisp from the Standard Banner, Exclusive W-Engine Banners, and Exclusive Character Banners as a standard-rate A-rank W-Engine. That last part is important: you don’t need to wait for a dedicated rerun just to see it in the pool. If you’re pulling for Manato or another banner that includes A-rank engines, there’s a chance it shows up. I wouldn’t chase it blindly on a banner where you want the featured S-rank, but I also wouldn’t ignore it if you main a Rupture agent.
Is it worth spending pulls just for an A-rank engine? Usually no—unless you’re already deep into a Rupture team and you need the crit consistency. In that case, it’s a reasonable target, not a whale-only trophy.
Overclock Effects and Ascension Materials
Overclocking Grill O’Wisp improves the engine’s effect, which is exactly what you want from a conditional crit stick. The higher the overclock, the more the CRIT Rate payoff justifies building around HP loss. I won’t pretend every rank is a game-changer, but if you’re using Manato or Banyue as a main, the investment makes sense.
For ascension, the structure is the usual ZZZ W-Engine routine: W-Engine Batteries and Dennies, with higher ascension tiers asking for higher-rarity batteries. The image below is the quick visual reference I use so I don’t accidentally farm the wrong tier.
| Ascension Step | What You Need | My Note |
|---|---|---|
| Early phases | Lower-tier W-Engine Batteries + Dennies | Cheap; don’t overfarm |
| Mid phases | Advanced W-Engine Batteries + Dennies | Start checking your inventory |
| Late phases | Higher-rarity W-Engine Batteries + Dennies | Plan around your main team |
Final Verdict
Grill O’Wisp is a specialist, and I respect that. It’s not the A-rank engine I’d recommend to every new player, but for Manato, Banyue, and HP-loss Yixuan teams, it’s a genuinely strong option. The CRIT Rate boost is massive when it’s active, and the activation condition is easy to meet if you’re playing the right agent. So ask yourself: does your team actually lose HP on purpose? If yes, Grill O’Wisp is worth a look. If no, save your resources and pick a more generic engine. That’s the honest answer.