The New Blood Festival brought 6.80 Dota 2 patch, 2 New Heroes and a new game mode Random Ability Draft!
More info bellow!
The New Blood Festival brought a large number of update to the Dota 2 client, I will do just a roundup of the most important ones. You can view full changes here:
RANDOM ABILITY DRAFT
This mode has been know to almost all of the old DotA players. In this mode you get random spells and you choose and make your own Hero. I really love this mode and this mode will stay in Dota 2 forever.
You can only play this mode in the normal pub games, not in ranked.
New Dota 2 Themed Map
The map brings a really nice look to the whole game and I personally really like it.
Some screenshots of the map
You can choose this themed map in the PREFERENCES tab by clicking on the "Themed Map" button.
NEW HERO - TERRORBLADE
A well known Hero to all of the DotA players and finally in Dota 2!
Cannot be picked in CM. You can view his whole abilities on the official Dota 2 Heropedia: http://www.dota2.com/hero/Terrorblade/
NEW DOTA 2 HERO - PHOENIX
A good DPS range Hero.