Dota 2 - Three Spirits Update

User Interface

Lanepicker added to hero selection screen
You can now invite to trade from within Dota 2, including people you aren't friends with (privacy settings available)
Games that are part of a best-of series are now grouped and spoiler-protected in the recent games panel
Added set browser to Hero Picker
Broadcasters can now specify a country and description per channel when setting up a lobby for specators
Showcase View can be activated using the icon on the left side of your hero portrait.
Colorblind option added
Closed-captioning option added
Added a "Pending Invitations" tooltip when in a party that lists outstanding party invitations
Added Acknowledgements tab to the Library
Fixed incorrect turn arrows when spectating Captains Mode drafts
New convar dota_ability_legacy_mode_quick_cast causes all ability casts in Legacy keybinding mode to be Quick Casts
You no longer need to equip pennants to have their view counts updated and count towards teams you watch live
New Player Experience
Bots now substitute for players that leave in Limited Hero mode
Added last hit training missions

Community

Changed low-priority penalty metric from time-based to games played
Added messaging popups and more indications of low-priority status in interface
Added new survey questions about self and team cooperation
Audio
Game Voices and Sound Effects now have separate volume sliders
Added a damage sound to Blademail reflect (only audible to attacking player)
Added a sound on Diffusal Blade target units
Corrected Clockwerk's spawn line
Fixed FoW issues with some Invoker, Crystal Maiden, and Nature's Prophet abilities
Visage ult sound no longer stacks with number of familiars
Bloodrage target sound now retriggers even if target is still silenced

Visuals

New support for remnant based effects. Visual updates to Storm/Ember/Earth Spirit remnants can be applied to all wearable items and will properly mimic when Rubick steals them
Modified Storm Spirit's effects to bring them visually in line with other Spirits

Coaching

Anyone in a matchmaking party can specify that they'd like to coach the party instead of play. In lobbies, players can choose to coach a team instead of play or spectate. Coaches cannot be used in Team Matchmaking, or Tournament lobbies.
Increased maximum matchmaking party size to 6, to allow a coach to teach an entire team of students (but you can't Find Match if you have 6 players with no coach)
Coaches are able to use in-player perspective views and broadcaster tools like line drawing to teach their students. They are able to ping on the ground, the minimap, and anywhere in the HUD itself.
Coaches are considered to be on the same team as their students, so they cannot see anything in the game that their students can't see.
Coaches and students have private voice and text communication channels.
Coaches can hit their 'Hero Select' key to cycle through their students.
Coaches see spectator-style item purchase popups for their students.
In-perspective player view now shows the correct state of more HUD elements (Shop Quickbuy, KDA/Last Hits/Denies, Buyback). These improvements apply the the in-perspective view in live games and replays, as well as coaches.

Economy

Steam Community Market
This update may greatly disrupt market prices. In order to prevent items being purchased at pre-update prices for arbitrage, we are removing all item listings and returning them to their owners. While this removal process is taking place, new items will not be able to be listed on the Steam Community Market.
You can now list an item on the market from the armory (right click: sell on the market).
Armory item tooltips now contain the current lowest trading price for an item of the same class as the one highlighted. (Class is a somewhat flexible concept at the moment, so unusual courier prices will be less accurate than a specific wearable piece of equipment.)

Crafting

Crafting recipes now have a chance of dropping as a bonus item. These drops do not take up your normal drops, but are in addition to them.

Polymorph Recipes
These recipes take a variable number of any input of the same rarity and output a random other item of the same rarity. Example: 2 of Any Rare => 1 Random Different Rare

Augment Recipes
These recipes take a combination of inputs of the same rarity and output a random other item of the next best rarity. Example: 1 of Any Common & 1 Wavecrester => 1 Random Uncommon

Ancient Scroll Case
A new type of Treasure Chest called the "Ancient Scroll Case" has been added. These cases drop multiple recipes when they are opened.
The Ancient Scroll Case has a chance to drop an Exceptional Recipe. These make items that were previously only available as Genuine quality promotional items. The recipe creates a non-genuine version of the item.

Gems & Sockets
Items can now have up to 5 sockets.
A socket can receive a gem. Each socket can only contain one gem.
Some sockets require specific types of gems.
When a gem is added to a socket that already contains a gem, the previous gem is destroyed.

New Socketing Tools:
Artificer's Chisel: Adds a socket to an item.
Artificer's Hammer: Extracts the gems from an item.

Gem Types:

Kinetic Gems
Adds a new animation to the hero using the item.
Inscribed Gems
Adds stat tracking ability to the item similar to the old strange system.
The item they are added to changes to the "Inscribed" quality.
Ethereal Gems
Adds a particle effect to the item.
All unusual effects can now be colorized.
Prismatic Gems
Colorizes the particle effect on the effect gem.
Ascendant Gems
The Ascendant Orb, Gem of Taegeuk, and Bloodstones are now Ascendant Gems.
The item they are added to changes to the "Ascendant" quality. (in addition to tracking victories or gifts given as they did before).

Autograph Runes
Autographs are now Autograph Runes.
Allows you to tag an item with a pro player's autograph.
Since an item can have 5 sockets, you can now get a whole team to autograph an item.
The item they are added to changes to the "Autographed" quality.

Spectator Gems
Items that previously tracked 'games viewed' now contain spectator gems.
Spectator gems follow a specific league or team.
Styles that previously required 'games viewed' now require a gem with the same number of games viewed (for the correct league / player / team / etc).
Ethereal & Prismatic gems are used together on unusual items (couriers).
More types of gems will be coming in the future.
Unusual items do not change quality when gems are added. Non-unusual items will change in the order gems are added.

Item Quality Keywords
The item quality keyword "Vintage" has been changed to "Elder".
The item quality keyword "Tournament" has been changed to "Heroic".
The item quality keyword "Haunted" has been changed to "Cursed".
The item quality keyword "Strange" has been changed to "Inscribed".

Strange Items
Strange modifiers on items have been converted into stat tracking Inscribed Gems.
The stats on items are no longer wiped when an item is traded.
Strange modifiers that haven't been applied have been turned into 'gem packs' that grant a living stat tracking gem and a Artificer's Chisel to create a socket on an item.
Previously strange quality items are now have the inscribed quality.

Unusual Paint & Colors
Unusual paint items have been changed into Gem Packs that will grant a gem of the same color of the old paint item when used.
All couriers that were painted in the past will now have color gems already installed of the appropriate color.
All legacy courier colors (very old drop colors, bugged colors, etc) have been preserved as color gems. If you want, you can smash the courier to recover the legacy color gem and use it on some other courier or effect combination.
All unusual paint items on the Steam Community Market have been delisted. You can relist the Color Gem Packs.
All non-legacy colors (colors that drop normally from Treasure Chests) now have specific names (i.e.: "Verdant Green"). Legacy colors will have the name "Legacy (R G B)". (Most Legacy Colors are completely unique, but there are a few where more than one of that color exist.)
New colors will appear on Treasure Chest unusuals from time to time moving forward. While we will avoid selecting legacy colors we cannot completely guarantee that new colors will not sometimes be similar. The 800 or so unique legacy colors in existence cover a large amount of color space.