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Key takeaways
Hero changes

Advanced-server buff. Passive (Superconductor) mark duration up 3s to 5s (enemies stay marked longer). Skill 1's delayed-lightning trigger now refunds half the skill's cooldown instead of a flat 1.5s, letting Eudora chain combos far more smoothly in extended fights. (Corroborated by Elgin -1Yc7Gd8hjQ.)

Advanced-server buff. Skill 2 physical-attack scaling increased 20% to 25% per hit, so the longer the spin the harder it hits and the more it rewards a damage jungle build. (Corroborated by Elgin -1Yc7Gd8hjQ.)

Item changes
Advanced-server revert. Reverted closer to its official-server version while keeping its identity; the newer crit-true-damage passive that was tested on it in 2.1.82 has been moved off it and onto Berserker's Fury instead. (Transcript renders it 'red dragon sphere'; corroborated by Elgin -1Yc7Gd8hjQ as 'Great Dragon's Sphere'.)
Advanced-server rework and home of the migrated passive. Physical attack reduced 65 to 60; crit damage reduced 40% to 30%. New passive (Doom): a critical basic attack deals extra true damage equal to 12% of the damage before mitigation, so crit heroes shred frontliners far better while keeping squishy-backline damage. Both sources agree this is the patch's marquee item change. (Corroborated by Elgin -1Yc7Gd8hjQ.)
Advanced-server roaming-blessing buff. Cooldown reduced 80s to 60s, enabling far more frequent aggressive initiations, flanks and saves. (Corroborated by Elgin -1Yc7Gd8hjQ.)
Advanced-server roaming-blessing buff. Movement distance required to gain one stack of Force reduced 2 to 1, so the stack builds much faster while rotating. (Transcript renders it 'Dire Hit / Darhid'; corroborated by Elgin -1Yc7Gd8hjQ.)
Events mentioned
New 5v5 brawl mode on the advanced server. Players pick Chaos Fragments after reaching certain levels, granting global buffs (attack speed, cooldown reduction and other effects) that make fights faster and messier. No official-server date yet. (Three-source: 0d7, Elgin -1Yc7Gd8hjQ, Elgin ARbNga9xEgk.)
New system letting Moonton apply certain hero balance changes only in higher-rank matches without affecting lower ranks. On the advanced server the threshold is temporarily lowered to Master rank for testing. Five heroes get rank-exclusive tweaks here: Alpha (ult CD reduced), Dyrroth (stronger enhanced S2 defense reduction), Veil (ult slow greatly increased; Kazuki transcript renders 'Wells'), Edith (S2 CD reduced), Melissa (S1 CD slightly reduced). Also includes bush-vision optimizations for Mythical Honor+. (Two-source: 0d7 + Elgin -1Yc7Gd8hjQ.)
Advanced-server rework of ultimate economy. Removed the effect where manually casting the ultimate reduced its cooldown; instead base cooldown shortened (Kazuki: ~60-50s down to ~45-35s). Trade-off: auto-triggered Eternal Evil immortality duration cut 4s to 3s. Manual timing now more rewarding, auto-trigger riskier. (Corroborated by Elgin -1Yc7Gd8hjQ.)

Advanced-server quality-of-life buff. Ultimate (Swan Song) no longer accidentally interrupted by minor immobilize effects. Skill 1 slow up 30% to 40%. Ultimate no longer leaps to a target location; instead Odette can move slightly while channeling and is slowed only ~20% during it instead of ~90%, so she can reposition far more comfortably. (Corroborated by Elgin -1Yc7Gd8hjQ.)

Advanced-server experimental Feral rework. Passive Wound is now larger and breaking it triggers Feral state for ~3s, turning the next basic attacks into large-area Claw Strikes that can stack. Skill 2 now resets whenever one of her HP bars is depleted; base damage increased substantially while physical scaling lowered (stronger early, less item-dependent). Aimed at bringing Masha back into the meta. (Corroborated by Elgin -1Yc7Gd8hjQ.)

Advanced-server nerf, flagged as over-performing in ranked and pro play. Skill 2 mana cost increased 45 to 75 (big early-game hit). Small compensation: passive mana regen from Crimson Butterflies up 3% to 4%. Intent is to force resource management rather than free S2 spam. (Corroborated by Elgin -1Yc7Gd8hjQ.)

Advanced-server shift back toward sustain. Passive spellvamp ratio up 60% to 75%; in exchange both parts of Skill 1 deal lower physical-attack scaling. Less burst, more sustained team-fight presence. (Corroborated by Elgin -1Yc7Gd8hjQ.)

Advanced-server mobility buff. Skill 2 cooldown now scales down with skill level (toward ~8s) instead of staying flat at 10s, giving more dashes for engages/repositioning in mid-to-late game. (Corroborated by Elgin -1Yc7Gd8hjQ.)