Ultimate Yujin quietly flips the original healer on his head for The First Descendant. Instead of sitting back as a pure medic, he can now act as a frontline DPS, team buffer, and resistance shredder all at once. With the right setup, he becomes one of the few Descendants who can carry damage meters while still keeping everyone alive.
This guide breaks down the best Ultimate Yujin build for The First Descendant‘s Season 3 and beyond, with a focus on Battlefield Medic for real content like Forbidden Sanctuary, Axion Plains farming, and Void Erosion Purge.
1. How Ultimate Yujin Works in The First Descendant
Ultimate Yujin keeps the identity of a support Descendant, but his new upgrades turn him into a fully capable DPS instead of a passive healer. With Battlefield Medic, he brings burst damage, party-wide buffs, and strong heals in the same loadout, which is rare even among Ultimate variants.
He revolves around a custom resource with three levels. You generate this resource by healing or buffing yourself and allies, and at level three, Yujin gains massive bonuses: more crit rate, crit damage, and cooldown reduction. The entire playstyle revolves around maintaining that level-three state while constantly cycling skills.
Compared to the Combat Protocol module, which leans into HP-scaling Fusion skills and weapon synergy, Battlefield Medic is more efficient. It provides 101% bonus skill power from buffs alone, strong utility, and smoother scaling with the current meta, where skills outperform firearms in most endgame scenarios.
Ultimate Yujin’s backstory.
1.1 Ultimate Yujin’s Strengths and Weaknesses
Ultimate Yujin stands out as a hybrid carry: he can top damage while still playing the team’s safety net. Understanding where he excels makes it easier to decide if he deserves your resources.
| Strengths | Weaknesses |
|---|---|
| Battlefield Medic lets him deal significant damage while buffing team skill power and firearm attack. | If you drop your custom resource stacks, you lose a big part of your crit and cooldown power. |
| At level-three resource, he gains +30% crit rate, +30% crit damage, and +30% cooldown reduction, making his rotation extremely fluid. | His fourth skill’s shred does not benefit non-attribute damage, so your own numbers do not fully profit if you lean too hard into non-attribute scaling. |
| Moving healing zones, long-range skills, and strong crit scaling make him excellent in high-density content. | While playable, Combat Protocol requires strong weapon meta support and specific Ancestor Modules to feel competitive, making it less forgiving for most players. |
Ultimate Yujin is best for players who enjoy active buff juggling, watching crit numbers spike, and enabling the whole squad. If you want a “set and forget” healer, he will feel too busy. If you like hybrids who do everything at once, he is one of the strongest picks in the current roster.
2. How to Unlock Ultimate Yujin in The First Descendant
Unlocking Ultimate Yujin is a mid to late-game project, tied directly to Season 3’s Axion Plains content and the new Forbidden Sanctuary Infiltration Operation. That means you will not stumble upon him by accident; you need to deliberately target his blueprints and materials.
You unlock him through the Research system as usual: collect his unique Code and component blueprints, then feed in the required region materials and Entropium. Most of these drops are tied to Axion Plains missions, Forbidden Sanctuary clears, and their associated Spoils Boxes.
2.1 Where to Farm Ultimate Yujin’s Materials
While exact material counts can vary by patch, the overall loop follows a consistent pattern. Expect to farm the following types of content if you wish to unlock and build Ultimate Yujin in The First Descendant.
- Forbidden Sanctuary Dungeon: Your primary source for Ultimate Yujin Blueprints and late-game drops tied directly to his kit.
- Axion Plains missions and operational zones: Efficient for farming Entropium and region materials used in his components.
- Spoils Boxes (Blueprint/Arche loot): Provide his Code and core blueprints once you start targeting the correct loot tables.
Plan to combine targeted dungeon grinding with regular Season 3 progression. If you already push Forbidden Sanctuary for gear, you will naturally make progress toward his research without needing a separate farm route.
Farm Ultimate Yujin’s materials in the Forbidden Sanctuary dungeon.
3. Best Ultimate Yujin Builds in The First Descendant
Ultimate Yujin offers two main paths: Combat Protocol and Battlefield Medic. In practice, Battlefield Medic clearly stands out as the best all-around build. At the same time, Combat Protocol is a more niche option for The First Descendant players who want to experiment with HP-scaling Fusion damage and heavier weapon usage for their Ultimate Yujin build.
Below, we focus first on his strongest setup, then briefly cover the alternative.
3.1 Combat Protocol Build (Solo / Carry PvE)
This is your aggressive “battle doctor” Ultimate Yujin setup for content like Forbidden Sanctuary, Axion Fields, and general endgame farming. It leans on Combat Protocol, high Max HP, and strong Skill Power to convert Yujin’s health into huge AoE bursts while instantly healing himself and nearby allies.
3.1.1 All Items to Use for Ultimate Yujin Combat Protocol Build
External Components
- Prioritize Max HP, DEF, and Skill Power so Combat Protocol has a big pool to spend from while staying safe.
- Look for Cooldown Reduction and MP sustain lines so you can cast constantly without starving your skills.
Trigger Modules
- Combat Protocol: Core Module that lets Yujin spend HP to deal extra Skill Damage and then heal it back through his buffs and heals.
- Battlefield Medic (secondary): Even in this DPS build, it adds attack boosts when you actively support allies, scaling your damage just for doing your job.
- Shield/HP conversion picks: Modules that turn high HP/DEF into Skill Damage or Attack are excellent here, since you are already stacking bulk.
Ultimate Yujin Combat Protocol Arche Tuning setup.
Weapons
- Use a strong, high base Attack firearm that feels good while weaving skills, like a burst rifle, tactical rifle, or launcher with solid rolls.
- Prioritize non-attribute or Fusion/Toxic friendly weapons if your Reactor is tailored around those ratios, so both gun and skills benefit.
- Utility weapons with DoT or debuff procs pair well with Yujin’s kit, helping you keep enemies softened while you rotate skills.
3.1.2 Ultimate Yujin Combat Protocol Build Rotations
- Open fights by tagging allies with your main buff / heal skill so Battlefield Medic starts stacking attack bonuses in the background.
- Drop Yujin’s primary heal or shield field in the middle of the pack, then activate Combat Protocol-boosted skills inside it to convert HP into considerable AoE damage.
- Weave basic gunfire between skill casts to keep pressure up while your HP naturally bounces back from your heals and buffs.
- In tougher content, stagger your HP-consuming casts: do not press all enhanced skills at once if your heals are on cooldown or allies are low.
- Maintain a rhythm where you spend HP for burst, instantly heal it back, then repeat, staying in that sweet spot where you are aggressive but never actually fragile.
This build turns Ultimate Yujin into a frontline support-DPS hybrid who can carry groups, delete packs, and still keep everyone standing. If you want a healer that dictates the pace of the fight instead of just patching people up, this is the build to start with.
Ultimate Yujin Combat Protocol Build.
3.1 Battlefield Medic Build (Pure Support / Co-op Dungeons)
Battlefield Medic pushes Ultimate Yujin into a dedicated team support role, trading some personal burst for huge team utility, safer positioning, and consistent healing. It shines in coordinated groups, high-rank content, and fights where keeping everyone alive matters more than topping the damage chart.
3.1.1 All Items to Use for Ultimate Yujin Battlefield Medic Build
External Components
- Focus on Max HP, HP Heal, and DEF, so your heals and shields hit harder, and you are very hard to kill.
- Add Cooldown Reduction so core support skills loop quickly, and your party never feels downtime on buffs.
Trigger Modules
- Battlefield Medic: The centerpiece, boosting Yujin’s Attack as he heals, shields, and supports allies, turning pure utility into real offensive value.
- Outgoing Heal and Shield modules: Anything that increases HP Heal%, shield strength, or range makes your support window much more forgiving.
- Optional sustain picks like MP conversion on cast help in long fights where you are spamming heals on cooldown.
Weapons
- Use comfortable, reliable primaries with good uptime, such as assault rifles or SMGs—your main job is to stay alive and keep casts flowing.
- Weapons with team-support passives or DoT debuffs are a bonus, but not mandatory; Yujin’s value comes mostly from his skills in this build.
3.1.2 Ultimate Yujin Battlefield Medic Build Rotations
- Start encounters by tagging all nearby allies with your core buff / heal skill, instantly activating Battlefield Medic’s attack-scaling effect.
- Keep your main heal and shield fields on priority targets (tanks, squishier carries) and reposition them as the fight moves.
- Use your emergency or burst heal only when health bars dip sharply; otherwise, rely on your regular skills to maintain a steady regen baseline.
- Between casts, stay in a safe midrange position, firing your weapon mainly to keep pressure and regain MP or Trigger uptime where applicable.
- In high-pressure phases, chain your defensive skills so the party always has at least one layer of protection or regen active.
This build turns Ultimate Yujin into a true raid doctor, keeping teams alive through punishing mechanics while still adding meaningful damage from Battlefield Medic’s attack scaling. If your group needs a durable, proactive support for new content and Void Abyss rotations, this is the version of Yujin you want to bring.
Below is a showcase of the Ultimate Yujin Battlefield Medic Build, courtesy of the OrneryBiscuit YouTube channel.
Ultimate Yujin Battlefield Medic Build. Image credit to the OrneryBiscuit YouTube channel.
4. Is Ultimate Yujin Worth Building in The First Descendant?
Ultimate Yujin is absolutely worth building if you want a single Descendant that can DPS, heal, and debuff without swapping characters. Battlefield Medic turns him into a crit-based singular nuker who also happens to be one of the strongest support picks for new Season 3 content, especially Forbidden Sanctuary and Axion missions.
His Battlefield Medic build brings 101% extra Skill Power from internal buffs, permanent level 3 passive uptime, and intense healing and resistance shred, making him valuable in both solo runs and four-player groups. Combat Protocol is an interesting HP-fusion experiment that combines Enlightened Mage with buff snapshotting, but it is harder to optimize and less reliable in the current meta.
Suppose you are willing to invest in his research and learn his resource management. In that case, Ultimate Yujin becomes a bonkers all-rounder: he keeps your team alive, boosts everyone’s damage, and still posts competitive numbers on the scoreboard. For Season 3 and beyond, he is not just a “male healer” – he is one of the strongest hybrid supports you can add to your roster.
Ultimate Yujin the Medic.
