Ravenous Blade is the S-Rank Gas Arc built for Zankou, and it arrived alongside her in version 1.3 of Neverness to Everness as the game’s first limited-time weapon banner. It is not part of the standard Arc pool, so the only way to add it to your inventory is the Spellbound Arc Research Program.
Quick answer: Pull on the Spellbound Arc Research Program at 10 Tri-Keys (or 1,600 Annuliths) per pull. An S-Rank Arc drops by the 6th pull, and Ravenous Blade itself is guaranteed by the 8th, so 80 Tri-Keys covers a worst-case run.
Ravenous Blade stats and Arc Effect
The Arc pairs a raw ATK stat with Crit Rate as its substat, which is unusually convenient for a Crit-hungry damage dealer. Everything else it does keys off Incantation damage.
| Detail | Value |
|---|---|
| Rarity | S-Rank |
| Type | Gas |
| ATK | 540 |
| Crit Rate (substat) | 24% |
| Source | Spellbound Arc Research Program (limited) |
Increases Crit Rate by 16.00%. Grants the wearer a 9.00% Crit DMG bonus for 15s when they deal Incantation DMG. Stacks up to 7 times, with no more than 1 stack gained every 0.3s. Resets the duration when triggered again.
Add the two Crit Rate sources together and the Arc alone hands the wearer 40% Crit Rate. Once all seven Crit DMG stacks are up, that is another 63% Crit DMG on top, refreshed every time the wearer lands Incantation damage. The stack cap is easy to hold as long as attacks keep landing, since the duration resets on each trigger.
Note: this is a Gas Arc, and Arcs can only go into the slot of a character sharing the same type. A non-Gas character cannot equip it at all, regardless of rarity.
How to pull Ravenous Blade on the Spellbound Arc Research Program
You know it worked when the Arc shows up in your Arc list and can be slotted into Zankou’s weapon slot. If an S-Rank appears but it is not Ravenous Blade, that was the off-rate result — keep going, because the rate-up Arc is locked in by the 8th pull.
Pull cost and guarantee
| Item | Value |
|---|---|
| Cost per pull | 10 Tri-Keys or 1,600 Annuliths |
| S-Rank Arc guaranteed by | 6th pull |
| Ravenous Blade guaranteed by | 8th pull |
| Worst-case total | 80 Tri-Keys |
The program opened right after the August 19th, 2026 maintenance and runs until September 19th, 2026 at 5:59 (UTC+8). After that window closes, the Arc leaves the banner.
Tri-Keys and the Mall’s Arc Shop
Tri-Keys come from Annulith processing and the Hunter Exchange, so the real budgeting question is how much Annulith you are willing to convert. The same currency also has a competing use in the Mall’s Arc Shop, where the Arc Selection tab lets you trade 25 Tri-Keys for a featured S-Rank Arc from the standing pool.
Those are two separate pools. Spending Tri-Keys in the shop does not bring you any closer to Ravenous Blade, so decide up front which one you are funding before you start burning currency.
Is Ravenous Blade worth pulling?
If you have Zankou, yes. She is an Incantation damage dealer on a Gas Arc, which means both halves of the passive are always active while she attacks, and the Crit Rate substat removes most of the work of getting her Crit stats to a usable ratio. Her damage ceiling drops noticeably without it.
If you do not have her, skip it. The passive is written around Incantation damage on a Gas-type wielder, and nothing else in the roster uses that combination well enough to justify 80 Tri-Keys. Holding the currency for a future banner is the better play.
Fallback Arcs for Zankou
| Arc | Substat | Why it works |
|---|---|---|
| Ravenous Blade | Crit Rate 24% | Best in slot; Crit Rate plus stacking Crit DMG on Incantation hits |
| Contemplative Cat | Crit DMG 44% | Used purely as a Crit DMG stat stick; its Cosmos passive does nothing for her |
| Fluff of Finesse | ATK 27.5% | Adds ATK% and stacking damage, but requires Critical Dodges to hold stacks |
Whichever Arc she ends up holding, Zankou still wants the Crimson: Twin Butterflies cartridge set, which grants Incantation DMG and stacks ATK% whenever the team applies Incantation damage nearby.
The math is simple enough to settle before you open the Fair menu. Eighty Tri-Keys is the ceiling, the banner closes on September 19th, and the Arc only earns that price tag on one character. If Zankou is on your team, budget for the guarantee rather than gambling on an early drop.
