How to Unlock Atomic and CID V2 in Sailor Piece on Roblox

Sailor Piece on Roblox continues to expand its roster of powerful abilities and weapons, and few additions have generated as much buzz as the Atomic line of content. Shadow CID Atomic arrived in a January 2026 update as one of the strongest abilities in the game, and the March 2026 massive update followed up with the Atomic Sword and the highly anticipated CID V2 fighting style. If you’re trying to figure out what each of these is and how to get them, here’s the full breakdown.

Quick answer: Shadow CID Atomic requires you to find a specific NPC, meet boss-defeat requirements, and have the right trait and rank. The Atomic Sword drops from a boss enemy at a set location. CID V2 is a new fighting style obtained through its own quest chain added in the March 2026 update.

Image credit: *Roblox (via YouTube/@Simple9064)*

Shadow CID Atomic — Requirements and How to Obtain

Shadow CID Atomic was introduced in late January 2026 and is considered one of the most powerful abilities currently in Sailor Piece. Unlocking it involves several prerequisites that you’ll need to satisfy before the NPC will grant you the ability.

Locate the Shadow CID Atomic NPC in the game world. The NPC is tied to a specific quest location, so make sure you’ve progressed far enough in the game to access the area where it spawns.

Meet the boss requirements. You need to have defeated certain bosses before the NPC will interact with you. These boss kills serve as proof that your character is strong enough to handle the ability.

You need to have defeated certain bosses before the NPC will interact with you | Image credit: *Roblox (via YouTube/@Simple9064)*

Ensure you have the correct trait and rank. Shadow CID Atomic is gated behind specific trait and rank conditions. If you don’t meet them, the NPC dialogue won’t progress. You may need to reroll traits or grind rank before attempting this step.

Speak to the NPC once all conditions are met. The ability will be granted, and you’ll gain access to Shadow CID Atomic’s full moveset, which includes high-damage combos and strong area-of-effect attacks.

Speak to the Shadow CID Atomic NPC after meeting all the conditions | Image credit: *Roblox (via YouTube/@Simple9064)*

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Shadow CID Atomic also introduced a new race and trait alongside it. Make sure to check whether you need the new race equipped before starting the quest chain.

Atomic Sword — Boss Location and Drop

The Atomic Sword was added in the March 2026 massive update alongside new tower content, runes, and other drop items. It’s a boss drop, meaning you’ll need to farm a specific enemy to get it.

Travel to the boss location where the Atomic Sword drops. The boss was added as part of the same massive update, so it’s in one of the newer areas of the map.

Defeat the boss. The Atomic Sword is not a guaranteed drop, so you may need to fight the boss multiple times. Bringing a strong build — ideally with high damage output from abilities like Shadow CID, Atomic, or a solid melee style — will speed up each run.

Check your inventory after each kill. When the sword drops, it will appear in your weapon inventory. Equip it and test it out; the Atomic Sword is rated highly in community tier lists for its damage scaling.

Tip: If you’re farming the boss repeatedly, consider using an AFK Boss Rush setup. Efficient Boss Rush farming can yield over 300 Rush Coins per hour, which helps you accumulate rewards while grinding for the drop.

CID V2 — The Upgraded Fighting Style

CID V2 is the evolved version of the original CID Kagenou fighting style and arrived in the March 2026 update. It’s quickly being discussed as a potential new meta style due to its damage output and combo versatility. Obtaining CID V2 does not require Robux — it’s fully earnable through gameplay.

Make sure you already have the original CID Kagenou style unlocked. CID V2 is an upgrade path, so the base version is a prerequisite.

Make sure you already have the original CID Kagenou style unlocked | Image credit: *Roblox (via YouTube/@Simple9064)*

Complete the CID V2 quest chain. The quest involves specific tasks and NPC interactions that were added in the same update. Progress through the dialogue and fulfill whatever combat or item requirements are presented.

Once the quest is complete, CID V2 replaces or upgrades your existing CID style. You’ll notice new moves in your ability bar and significantly higher damage numbers during combos.

Complete the CID V2 quest chain | Image credit: *Roblox (via YouTube/@Simple9064)*

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CID V2 is being evaluated as one of the strongest styles in the game right now. If you’re building for PvP or high-level PvE content like the Infinite Tower, it’s worth prioritizing.

Useful Codes for Sailor Piece

While grinding for Atomic content and CID V2, you can redeem codes for free rewards. The following codes have been shared by the community and may still be active:

Code	Notes
UPDATE2	General update reward
DUNGEONS	Dungeon-related reward
20KMEMBERS	Community milestone
DELAYSORRY	Compensation code
2MVISITS	Visit milestone reward
15KLIKES	Like milestone reward
5KCCU	Concurrent player milestone

Codes expire without warning, so redeem them as soon as possible. Enter them through the game’s code redemption menu on the main screen.

Progression Tips for Farming Atomic Content

Getting all three Atomic-related items — Shadow CID Atomic, the Atomic Sword, and CID V2 — requires a well-rounded character. You’ll want to have your Haki leveled, a strong melee or sword build, and enough rank to meet NPC requirements. The Infinite Tower is a good place to farm experience and materials if you’re not yet at the level needed for these quests and bosses.

Sailor Piece updates frequently, and the meta shifts with each patch. Shadow CID Atomic was the top ability when it launched in January, and CID V2 is already competing for that spot just two months later. Staying current with new content drops will keep your build competitive, especially if you’re pushing high-level Boss Rush or Infinite Tower content.