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Key takeaways
Hero changes

Advanced-server 2.1.82 (second source, corroborates Kazuki). Spell-vamp ratio increased and the missing-HP bonus raised, so the lower her HP the more her skills heal — sustain in drawn-out fights gets much stronger. Trade-off: basic attacks can no longer trigger lifesteal, pushing healing onto skills. Skill 1 early damage slightly higher, late scaling slightly lower (stronger laning, less explosive late). Skill indicator optimized so the Scythe and Shockwave damage areas are easier to read.

Advanced-server 2.1.82 (second source, corroborates Kazuki). Targets her ranged basic-attack playstyle: skill 2 range reduced and ultimate enhanced-basic-attack range reduced, plus ultimate duration shortened — she can no longer poke and chase as comfortably from a safe distance or fight as long as a semi-marksman. Compensation: early-game HP regen from basic attacks greatly increased. Net: less ranged threat, better early sustain.

Advanced-server 2.1.82 (second source, corroborates Kazuki). Developers cited Gloo sitting too high in both win rate and ban rate. Skill 1 explosion damage reduced (early through late game) and ultimate attached-regen decreased, especially in the early game — still a strong disruption tank but noticeably less unkillable in early skirmishes.

Advanced-server 2.1.82 (second source, corroborates Kazuki). Passive (Demonic Slash) base damage and HP regen both significantly increased for smoother trading/sustain. In exchange it ignores less physical defense from enemy heroes (weaker anti-tank shred). New effect: Demonic Slash now also ignores buildings' physical defense — a notable tower-pressure / split-push buff.

Advanced-server 2.1.82 (second source, corroborates Kazuki). Targets late-game strength: passive bonus damage against minions reduced (slower lane clear) and the damage reduction gained after an enhanced skill reduced, so enemies have a better chance to burst him down if he dives at the wrong time.

Advanced-server 2.1.82 (second source, corroborates Kazuki). Hanekage-form skill 2 dash now has better control: instead of a fixed locked movement, Hanzo can choose the landing area within a certain range — cleaner repositioning, smoother chasing and escapes during ghost form.
Item changes
Advanced-server 2.1.82 redesign (second source, corroborates Kazuki). Price increased and crit-chance attribute increased. The old unique passive 'Supreme Warrior' (movement speed after casting the ultimate) is removed entirely — devs said only a few heroes used it well. New unique passive 'Sunder': a critical basic attack deals extra true damage to the target, since true damage ignores normal defenses — repositioning the item toward crit heroes punching through durable/tanky targets rather than a post-ultimate speed boost.