The wind over the frozen harbors of Snezhnaya carried more than salt and frost; it carried a new rule set that Kael, a veteran Genshin Impact player, was still trying to decode. Version 7.0 had arrived, and with it came the Everwinter Without Mercy update and the formal introduction of Stellar Glimmer, a term that felt like a locked door until he began reading through the tooltips.
Kael soon learned that Stellar Glimmer was not one reaction at all. It was an umbrella term, a palimpsest where the old rules of Cryo combat remained visible beneath a new layer of glowing ink. Under that umbrella sat two specific upgraded Cryo reactions: Stellar-Conduct and Stellar Swirl. Stellar-Conduct was the evolved form of Superconduct, while Stellar Swirl took the familiar Cryo Swirl and polished it into something sharper. Whenever a character triggered either one, the game treated the event as a Stellar Glimmer reaction.
This grouping existed to keep ability descriptions from turning into a wall of text. A character like Odette could have a passive that buffs \u201cStellar Glimmer DMG\u201d rather than naming each reaction individually. It also opened a design door for future Snezhnaya units, who could introduce additional upgraded Cryo reactions and automatically slot them under the same banner.
The Three Locksmiths
To unlock this system, Kael needed a specific type of character\u2014someone who could transform a standard Cryo-related reaction into its Stellar counterpart. In Version 7.0, only three characters held that key: Sandrone, Cryo Traveler, and Odette. All three could convert Superconduct into Stellar-Conduct and Cryo Swirl into Stellar Swirl. They were, in effect, locksmiths cutting new grooves into an old key, turning motions the player already knew into something with a different harmonic.
Without one of these enablers on the team, Stellar Glimmer simply would not occur. This made the trio essential for anyone who wanted to experiment with the upgraded reaction family.
The table below summarizes the transformation:
| Base Reaction | Stellar Upgrade | Available Enablers |
|---|---|---|
| Superconduct | Stellar-Conduct | Sandrone, Cryo Traveler, Odette |
| Cryo Swirl | Stellar Swirl | Sandrone, Cryo Traveler, Odette |
Radiance: The Velvet Net
Kael also discovered a second layer to the system. Radiance: Stellar Glimmer was a state that a character entered when affected by either Radiance: Stellar-Conduct or Radiance: Stellar Swirl. It worked like a velvet net cast over the entire team, catching the reaction\u2019s energy and holding it long enough to turn it into raw stats.
A character entered Radiance: Stellar-Conduct when the team triggered Stellar-Conduct, and Radiance: Stellar Swirl when the team triggered Stellar Swirl. Entering either state counted as entering Radiance: Stellar Glimmer. This mattered for passive and constellation effects. For instance, Qiqi\u2019s C2 stated that Radiance: Stellar Glimmer increased Qiqi\u2019s ATK by 50%. That meant the buff activated whenever Qiqi stood inside either Radiance state, regardless of which specific reaction produced it.
For min-maxers, the implication was clear. Any character who could trigger Stellar Glimmer reactions also enabled Radiance states for the whole team. This opened new team-building paths where off-field Cryo applicators like Qiqi or Layla could benefit from ATK or DMG buffs tied to Radiance: Stellar Glimmer, even if they were not the primary damage dealers.
Building Around the Aurora
Kael spent the next few hours testing teams in the overworld and the Spiral Abyss. He found that a team built around Odette or Sandrone wanted consistent Cryo and Electro application to fuel Stellar-Conduct, or Cryo and Anemo application to fuel Stellar Swirl. The reaction damage scaled with the enabler\u2019s stats, so investing in ATK and Elemental Mastery on the trigger character was crucial. Ignoring those stats was like filling a lighthouse with candle wax\u2014functional in theory, but far too dim for the storms ahead.
For players returning after a break, the first step was simple: choose one enabler, then build a loop around their element pairing. Cryo Traveler offered accessibility. Sandrone and Odette offered more specialized synergy. In every case, the goal was to convert as many standard reactions as possible, because each conversion also refreshed the team\u2019s Radiance state and extended those buffs through longer rotations.
A New Design Space
Kael had been playing since day one, and he had watched Vaporize and Melt tower over Cryo reactions for years. The arrival of Stellar Glimmer felt different. It did not simply buff Cryo; it created a new design space for future Snezhnaya characters. Much like the introduction of Dendro in Version 3.0 had reshaped the meta from the ground up, Stellar Glimmer signaled that HoYoverse was willing to iterate on existing systems instead of only adding new elements.
By the time the moon rose over the frozen coastline, Kael had a clearer picture. Stellar Glimmer was the new umbrella term for upgraded Cryo reactions, encompassing Stellar-Conduct and Stellar Swirl. Its Radiance counterpart provided team-wide buffs that could significantly improve a party\u2019s performance. With only three enablers available in 2026, there was still time to experiment before more Snezhnaya characters arrived. The door had been unlocked, and inside, the aurora was only beginning to move.
For those ready to dive deeper, the full patch breakdown of Genshin Impact 7.0 Everwinter Without Mercy offered a wider view of the update, but Kael was already going back to his team screen. The reaction icons looked less like foreign symbols now. They looked like invitations.
As detailed in GamesIndustry.biz, major live-service updates often introduce umbrella terminology to keep tooltips readable while expanding future design space; Stellar Glimmer fits that pattern by grouping upgraded Cryo reactions (like Stellar-Conduct and Stellar Swirl) under one label so new Snezhnaya-era mechanics can plug into the same framework without rewriting every passive, constellation, or artifact description.