Content Update 3.4.0 -- Path of Exile: Delve

3 hours before, Path of Exile 3.4 Delve open, many players playing in the game, the following is the game client update content.

The Delve Challenge League

• Challenge leagues are a great opportunity for a fresh start in a new economy. All of your old characters and items are still present in the Standard and Hardcore leagues, but you're encouraged to join the new leagues, complete challenges and demonstrate your mastery of Path of Exile!
• With 3.4.0, there are Standard and Hardcore, and Solo Self-Found Standard and Hardcore, variations of the Delve challenge league available. They have the same core mechanics and items.
• In the Delve Challenge League you will delve into the Azurite Mine's infinite depths to extract treasure and discover its subterranean secrets.
• Help inventor Niko the Mad harvest Voltaxic Sulphite to power his potent lights. You'll need those lights if you are to survive in the mine, for stepping deep into the darkness is a sure way to die. Niko's mechanical explorer, the Crawler, will guide you to valuable pockets within the mine but deadly monsters and great treasures are waiting in the darkness.
• Bring flares to light your way when you explore away from the path the Crawler has laid for you. Carry dynamite to harm dangerous enemies and tear down fragile barriers, revealing treasures untouched for centuries.
• The deeper you go, the more dangerous and fierce both the darkness, and the monsters that inhabit it, become. How deep can you go?
• Ladders for each league (including both Solo and Party ladders for non-SSF leagues) track your maximum depth. Prove once and for all you have the best build!
• The new challenge leagues include a set of 40 new challenges. When you complete 12 challenges, you will receive the Canary pet. When you reach 24 challenges, you will receive the Azurite Back Attachment. At 36 challenge completed you'll receive the Delve Portal Effect. These microtransactions are only obtainable in this league.
• From the 19th challenge onwards and for every third challenge after that, you will receive pieces of the Delve Totem Pole decoration to display in your hideout. The Totem Pole permanently showcases how many of the Delve challenges you completed during the league.

Major New Content and Features

• Added a new Strength/Intelligence Skill Gem - Smite: Perform a melee attack, and in doing so, cause lightning to strike a targeted location or nearby enemy, dealing damage in an area. Enemies can't be hit by both the melee attack and the lightning. Gain a temporary aura which grants added lightning damage when you hit an enemy with this skill. Requires a Sword, Axe, Mace, Staff or Unarmed.
• Added a new Strength/Intelligence Skill Gem - Consecrated Path: Slam the ground with your weapon at the targeted location. If an enemy is near where you target, you'll teleport to it from a short distance away, slam, and create an area of consecrated ground. Can't be supported by Multistrike, and requires a Sword, Axe, Mace, Staff or Unarmed.
• Added a new Intelligence/Strength Skill Gem - Summon Holy Relic: Summon a Holy Relic that stays near you. When you hit an enemy with an attack, the Holy Relic triggers a nova spell, with a very short cooldown, that deals physical damage to enemies and grants life regeneration to allies. This life regeneration is more effective to your minions.
• Added a new Strength/Intelligence Skill Gem - Herald of Purity: Grants a buff, adding physical damage to your spells and attacks. When you kill an enemy while you have this buff, you'll summon a Sentinel of Purity, or refresh the duration and life of an existing one instead if you have the maximum number of Sentinels of Purity. The Sentinels of Purity have a single-target melee attack and an area melee attack.
• Added a new Dexterity Skill Gem - Scourge Arrow: Channel the attack to infuse an arrow with chaos, gaining stages while channelling. Release to fire a single piercing arrow which leaves spore pods in its wake for each stage gained. The spore pods bloom, then fire a nova of thorn arrows.
• Added a new Dexterity Skill Gem - Toxic Rain: Fire arrows into the air that rain down around the targeted area, dealing damage to enemies they hit and creating spore pods where they land. Each spore pod deals chaos damage over time to nearby enemies and slows their movement speed. After a delay, the pods burst, dealing area damage.
• Added a new Dexterity Skill Gem - Herald of Agony: Grants a buff giving more poison damage and a chance to inflict poison. When you poison an enemy while you have this buff, you gain Virulence, and summon a minion that uses projectile and area attacks. You will lose Virulence over time, at a rate which increases the more Virulence you have. The minion will die when you have no Virulence.
• Added a new Vaal Skill Gem - Vaal Ancestral Warchief: Summons an Ancestor Totem that attacks enemies with a powerful cascading slam while you're near it. If the enemies are far away, it will leap as it slams, bringing it closer. Being near it grants you more melee damage.
• Added a new Dexterity Support Gem - Withering Touch: Supported skills gain a portion of their Physical damage as extra Chaos damage, have a chance to inflict Withered on hit. Withered lasts 2 seconds, and is the same as the debuff applied by the skill "Wither".
• Added a new Atlas of Worlds feature: Shaper's Strongholds. These will appear once you have met the Shaper. They have multiple Shaper Influence mods active. Bosses of these maps can drop extra sextants, cartographer's chisels, Shaper-influenced items, and unique items.
• Added 26(ish) new Unique items, 3 of which were designed by supporters.
• Added 8 new Divination Cards designed by supporters.
• Added a new system to handle high-level players playing with lower-level party members in lower-level areas. High-level players are downscaled, making the area more challenging, and allowing the lower-level players to get an appropriate amount of experience and currency. Previously, the lower-level players would have had their experience gains and currency finds penalised if the level gap was significant. This scaling applies only in areas at or below level 67, and is an optional feature for party play.
• Added new Shadowed Point Light, Global Illumination and Ambient Occlusion graphics tech.
• Significantly updated the water simulation used by Path of Exile. It now flows correctly around corners, at realistic speeds based on the shape of nearby terrain, synthesising foam where appropriate.
• Added a new tooltip which, when hovering over a support gem, shows which currently-equipped skills can and cannot be supported by it. This includes skills built into items and skills whose functionality has been changed by another support (such as a spell supported by the Trap Support gem).

Minor New Content and Features

• You can now right-click on a stash tab in the dropdown list to send it to the far left of your tab list.
• Added a new vendor recipe.
• Added 3 new Fated Unique Prophecies.
• Added 22 new Labyrinth enchantments, including 2 for existing skills.
• Updated several older monster models, including Goatmen, Beasts, Blood Apes and Blood Chieftains.
• Added 3D art for the following unique items: Chains of Command, Speaker's Wreath, Tinkerskin, The Coming Calamity, Cloak of Defiance and Garukhan's Flight.
• Updated the visuals for several older skills. Namely: Ice Nova, Cleave, Frenzy, Heavy Strike, Caustic Arrow, and Double Strike. The default attack and wand attack both also have new effects.
• Added a League Information panel which you can view during character creation.
• Items filters are now capable of displaying minimap icons and lightbeams for specific categories of items, making them much harder to miss.
• Added the capacity to use custom local sound files in your item filter.
• Important dialogue options (like quests) are now highlighted in the NPC dialogue window.
• Enabled 2v2 PvP queues.
• You can now filter the Passive Skill Tree by the terms "Keystone" and "Notable".
• Added a new story glyph to the Ashen Fields.
• You may hear the slaves in the Slave Pens talking to you now.
• Fleeing Oriath citizens now say things that will make you feel even worse for accidentally killing them!
• That guy who opens the gate to Lioneye's Watch now also says something!
• There are now children hanging out in Oriath Square (the nice version). Go say hi!
• Added a section to the mapping panel in the Help Panel about the Shaper and the Elder.
• Updated the art on the divination card The World Eater to display the Shaper effect, and updated the art of The Samurai's Eye to display the Elder effect.
• Fire Trap and Explosive Trap now ignite the vegetation. 
• Improved the physics simulation at low framerates.
• Added a new buff icon for Arcane Surge.
• Continued to incrementally improve the sound, art, effects and environments.