Today a patch was released for the DotA 2 Test Client and it looks awesome so far. Guardian Wisp and Luna have been thrown into the mix as well as a tonne of graphical, UI and gameplay mechanics fixes have been added.

Interestingly enough, Rubick the Grand Magus has not been added to Captain's Mode. This breaks Valve's usual pattern of patching (typically the previous patch's hero(s) would be added to CM). This probably implies they want to see how these latest fixes to his mechanics and visuals work before they give him the go ahead for competitive participation.

If you planned on or have bought a ticket already for any DotA TV events you might be happy to know that the codec used for the in-game audio feed has been overhauled. Your favourite caster will now sound better. This will also translate to in-game voice transmission; so when you're matchmaking and you need to scream "please for the love of god, last hit the mobs" to that Phantom Assassin in your lane he should hear you loud and clear.

Remember all these changes are currently only a part of the test client, if you don't muck around on that you'll have to wait for the next patch to see these features live in the standard client. A full list of changes can be found below:

EDIT: Patch has gone live in standard client. Enjoy!

HIGHLIGHTS:
- Added Luna
- Added Guardian Wisp
- Dota 2 now uses the CELT codec for increased voice communication quality.
- Added a testing tool to the Workshop tab that allows contributors to see their models on a hero before submitting.


GAMEPLAY 
- Bloodseeker: Fixed a bug where he could get healed by friendly heroes dying in the area around him that he didn't deny.
- Pudge: Fixed a bug that was sometimes causing Pudge's Dismember to do an extra tick of damage
- Pudge: Fixed a bug that allowed Pudge to deal damage without hurting himself by quickly toggling Rot.
- Rubick: Fixed a rare case where Rubick could get permanently stuck with Telekinesis Land.
- Rubick: Fixed a bug where Rubick would gain permanent Spectral Dagger buffs until he died.
- Rubick: Fixed a bug with Poison Release that would cause you to steal the wrong ability from Shadow Demon.
- Rubick: Stealing Spirit Bear is temporarily disabled.
- Fixed being able to use a different player's items in your combine, if that item was in your stash at the time

VISUALS
- More Rubick spell animations
- Various Rubick visual effect improvements and fixes
- Haste animation added for Bloodseeker
- Adjusted Ogre Magi's sidearm attack animation 
- Logos removed from waterfall and mid river areas to safeguard gameplay
- Tweaked dire banner position left of fountain shop
- Roshan timer appear only after 10 seconds have passed from death
- Reduced Gyro's model scale a little
- Removed ambient effects on Razor and Morphling when hexed

UI
- Fixed some cases where icons could get stuck on the screen
- Fixed new heroes not showing up in the hero picker if you had custom view set (They'll now appear in the top left of the grid view, for you to then place as you like)
- Tournament Panel: Fixed game list not refreshing unless you opened a different tournament and then back.
- Tournament Panel: Increased the size of the live games and recent games.
- Tournament Panel: Fixed details button not working properly for the last few games.
- Fixed Spectator label cutting off number of spectators.
- Fixed Live games not displaying correctly after opening a Tournament.
- Fixed a recent bug with the shop not closing when a unit is selected
- Fixed some bugs with losing commentator perspecting when pausing and unpausing
- Added backpack preview to couriers 
- Back button in the loadout takes you back to the backpack if you arrived via a backpack right click
- Fixed some slots on the backpack not being right-clickable if they were not on page 1
- Fixed the first equip from the backpack sometimes not working properly 
- Added inspect button near the hero panel for heroes that have custom items
- Updated the replay skill filter to have more usefull categories.
- Fixed dragging an item onto itself not turning its icon back on.
- Cheat commands are now echoed to chat 
- Added a testing tool to the Workshop tab that allows contributors to see their models on a hero before submitting.

AUDIO:
- Dota 2 now uses the CELT codec for increased voice communication quality.