Blizzard has revealed at BlizzCon 2016 that Hearthsone will receive a new expansion named the Mean Streets of Gadgetzan. Along with the announcement, Blizzard also said that there will be 132 new cards added to the existing Hearthstone deck as well as a new theme centered around gangs.
Hearthstone Mean Streets of Gadgetzan will introduce three new gangs the Grimy Goons, Jade Lotus, and Kabals. Each of these crime families have three classes. The Grimy Goons have Hunters, Paladins, and Warriors. The Jade Lotus have Rogues, Druids, and Shamans. The Kabals have Priests, Mages, and Warlocks.
There are special cards that will power-up the attack of each class. For example, the Piranha Launcher will allow the hero to launch piranhas against their enemies. The Lotus Assassin makes a player much stronger every time he kills an enemy. The Kabal Talonpriest will give any of your members two extra health points.
Hearthstone will also introduce tri-class cards, which a lot of Hearthstone players are excited about because it will definitely make the gameplay much more exciting. That's because tri-class cards can go into one of the three classes. For example, Kazakus can go and work for a Warlock, Mage, or Priest.
In the past, cards are only placed in two categories: Class and Neutral. Class is composed of the nine classes, namely Druids, Rogues, Shamans, Hunters, Paladins, Warriors, Priests, Warlocks, and M ages. Neutrals, on the other hand, can be placed in any decks. Tri-class cards also allow players to discover minions and spells. Each gang will have three tri-class cards and one Legendary.
Some examples of tri-class cards are the Eaglehorn Bow which gives a Paladin extra value for his Secrets, and Innervate which allows a Shaman to use Fire Elemental for 4 mana instead of the usual 6.
Hearthstone Mean Streets of Gadgetzan will be released in December.