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The Seasonal Powerhouse: The Void Heart
Before discussing regular items, it is important to highlight the new seasonal artifact: the Void Heart. This is a special socketable item that you enhance by collecting Void Fragments from Void-Touched Elites. You can insert up to three Void Essences into the Heart, which provide powerful, build-defining effects. Key essences to seek include:

Essence of Voracity: Your Core skills have a chance to consume all of your primary resource, resulting in significantly increased damage.  
Essence of Echoing Strikes: Your damaging abilities may echo a second time for 50% damage.  
Essence of the Void Bulwark: Standing still for 2 seconds grants you a Barrier that absorbs Void damage and explodes when it is broken.  

Best Uber Uniques for Season 9 
Uber Uniques continue to be the ultimate sought-after items, and their power is undeniable in the new meta.

Harlequin Crest (Shako): Still the uncontested best. The +4 to All Skills, damage reduction, and resource generation make it the best-in-slot helmet for nearly every build in the game.  
The Grandfather: With the rise of Whirlwind and Bleed Barbarian builds, this two-handed sword's massive critical strike damage multiplier is more valuable than ever, elevating the Barbarian's damage to astronomical levels.  
Ring of Starless Skies: An ideal item for the newly buffed Sorcerer and resource-hungry Necromancers. The resource cost reduction and damage increase are essential for sustained casting in high-tier content.  
Doombringer:The lucky hit life steal and damage reduction make this an excellent defensive and offensive choice for Rogues, Necromancers, and Barbarians seeking to enhance survivability.  

Must-Have Class-Specific Uniques and Aspects
This section details the Diablo 4 Items Season 9 Best Items for each class, focusing on gear that supports their top builds.

Necromancer (S-Tier) 
Uniques:  
Ring of Mendeln:The fundamental cornerstone of the meta Minion build. Its Lucky Hit chance to empower all your minions serves as your primary source of boss-melting damage.  
Black River: Vital for Corpse Explosion builds, making your explosions larger and more frequent.  

Legendary Aspects:
Aspect of the Reanimator: A new aspect this season that significantly boosts your minions' damage the longer they are alive. A must-have.  
Coldbringer's Aspect: Your Skeletal Mages now cast Blizzard, providing excellent crowd control and synergy with other cold effects.  

Sorcerer (S-Tier)  
Uniques:
Tal Rasha's Iridescent Loop: With the Sorcerer's ability to easily apply multiple elements, this ring offers a consistent of item and powerful damage multiplier.  
Staff of Lam Esen:A crucial piece for making Charged Bolts a viable and powerful skill, synergizing perfectly with the Lightning buffs.  

Legendary Aspects:  
Gravitational Aspect:Transforms Ball Lightning into a slow-moving orb of death that orbits you, central to its top-tier build.  
Aspect of Overwhelming Currents: Provides Unstable Currents a chance not to consume a charge, enabling near-permanent uptime.The more updates of diablo 4 items,you can follow https://www.u4gm.com/diablo-4-items