Wuthering Waves Union Level Guide: Milestones and How to Raise It

Union Level is the account-wide gate behind almost every system worth caring about early in Wuthering Waves.

• It is separate from character level and weapon level — Union Level tracks account-wide progression, mostly raised by story quests.
• Nearly every other system on this site assumes a certain Union Level as a prerequisite: code redemption, Data Bank tier climbing, endgame modes, and the free weapon box all sit behind specific milestones.
• Because it is account-wide rather than per-character, pushing it benefits every Resonator on the roster at once, unlike leveling or Echo investment which only helps one character at a time.

Verdict: Union Level is the single highest-leverage account-wide investment in the early-to-mid game — treat raising it as a priority equal to or above individual character builds.

These are the milestones actually worth planning around.

Union Level	What it unlocks
Union Level 2	Redeem codes like WUTHERINGGIFT (in-game only, no website)
Union Level 27	4-cost (Calamity) Echoes start dropping — the first real stat jump
Union Level 30	Tower of Adversity opens; Data Bank can climb to the 5★-Echo tiers
Union Level 45	Free 5★ standard weapon selector box (Emerald of Genesis, Cosmic Ripples, or Static Mist)

Each milestone unlocks a system covered elsewhere on this site in more depth — codes, Echo farming priority, Tower of Adversity, and the weapon choice guide all assume the reader has already crossed the relevant gate.

Verdict: print this table mentally as checkpoints, not just numbers — reaching Union Level 27 or 30 changes what is actually worth farming, not just what is available to farm.

Not all activities raise Union Level at the same rate, and the biggest beginner mistake is optimizing for the wrong one.

• Main Quests hand out the largest Union Level EXP per activity, and a chunk of early Astrite is also gated behind chapter completion — treat side content as a break from the story, not the main plan.
• Exploration adds on top of story progress — Union Level EXP is also awarded from exploration activities, so clearing map objectives along the way to a quest marker is not wasted time.
• Grinding side content instead of pushing story is one of the clearest beginner mistakes: it feels productive but raises Union Level far slower than the same time spent on Main Quests.

Verdict: when time is limited, default to the next Main Quest over side quests or full map clearing — Union Level EXP per hour spent is simply higher on the story path.

At Union Level 45 you get a one-time box that lets you choose a free 5★ standard weapon. It is a permanent pick, so choose carefully.

• Emerald of Genesis (Sword) — Crit Rate and Energy Regen, the most broadly useful choice for sub-DPS and hybrid units.
• Cosmic Ripples (Rectifier) — strong for Fusion and Electro-adjacent DPS and sub-DPS builds.
• Static Mist (Pistols) — Crit Rate plus an Outro buff, good for burst-window teams.
• Skip Lustrous Razor and Abyss Surges — both sit in the same standard pool but are rated well below these three for actual team value.

Verdict: match the weapon type to whichever main-DPS is being built around; if unsure, Emerald of Genesis is the safest all-rounder pick, since standard weapons from this box are fallback gear rather than a specific character's true best-in-slot.

Union Level 30 opens the door to Tower of Adversity, but reaching that milestone does not automatically mean the roster is ready.

• A realistic entry bar is a Main DPS around level 70, supports around level 60, and Echoes leveled to roughly +20 — rushing in underleveled just wastes attempts against a mode with a rotating buff and enemy comp.
• These numbers line up with the progression priority elsewhere on this site: level and Ascension come first precisely so a roster hits this kind of bar naturally by the time Union Level unlocks the mode.
• If the account is Union Level 30 but well below this level bar, it is usually worth spending a few more days on story and Waveplate farming before pushing floors, rather than attempting Tower of Adversity underprepared.

Verdict: treat Union Level 30 as "the door is open," not "go in now" — check the level bar above before committing serious attempts.

Wuthering Waves does reference a mechanic called SOL3 Phase — a hidden in-game achievement titled "Excessively Cautious" is awarded for lowering it for the first time — but detailed mechanics for how it is raised or lowered, and what it unlocks, are not something this site has verified sourcing for yet.

• This is different from Union Level, which is well-documented with clear milestones and account-wide effects covered throughout this guide.
• Rather than guess at numbers or unlock conditions for SOL3 Phase, the honest answer is to check the in-game Sola Guide tab directly, where phase-related and cyclical challenge content is tracked live.
• This page will be updated with verified SOL3 Phase mechanics once a reliable source is confirmed — the priority here is not printing a plausible-sounding number that turns out wrong.

Verdict: for account-wide progression planning, Union Level is the system to build a routine around; treat SOL3 Phase as a separate in-game system to check directly rather than plan around from outside numbers.