New players start with only the mage class available, and must unlock the others through defeating them in matches in either Practice mode or Play mode. Unlocking all 9 classes also unlocks various other game features: the Arena, adventures, and "Expert" difficulty Practice mode.
Druid - Malfurion Stormrage
- Shapeshifting protectors of the wild, with powerful Taunt minions and adaptable Choose One effects, druids are also able to accelerate their rate of mana accumulation, allowing them to surprise opponents with unexpectedly savage plays.
Hunter - Rexxar or Alleria Windrunner
- Trackers and huntsmen, with a synergy with Beasts, a selection of bows, and a supply of cunning deadly traps, hunters never miss their mark. Whether unleashing their Beasts upon the enemy or sniping them from afar, hunters possess relentless and immediate damage capabilities.
Mage - Jaina Proudmoore, Khadgar or Medivh
- Masters of arcane, fire and frost, mages wield formidable single-target and area of effect damage spells, and can freeze enemies in their tracks. Mages have a strong spell-synergy, capable of turning minor incantations into devastating Fireballs, and can employ a range of magical Secrets to redirect enemy effects, render themselves immune, or stop the deadliest foe or spell in its tracks.
Paladin - Uther Lightbringer or Lady Liadrin
- Stalwart champions of the Light, wielding sturdy weapons and gifting the recruits of their order with Divine Shields and a range of powerful Blessings. Paladins can also use Secrets to alter the stats of friends and foes, and protect vulnerable targets.
Priest - Anduin Wrynn or Tyrande Whisperwind
- Devout healers with powerful restorative abilities, capable of sustaining themselves and their allies while sweeping away enemies, priests boast a range of healing synergies, but can also rely on their darker abilities to manipulate and destroy enemies, peering into or even seizing control of their opponents' minds.
Rogue - Valeera Sanguinar
- Subtle and evasive assassins, using flurries of swift sharp strikes to slice and incapacitate enemies, rogues prefer to wield light daggers, laced with deadly poisons. Rogues prefer to assault their opponents in rapid bursts of activity, activating Combos to gain powerful additional effects.
Shaman - Thrall or Morgl the Oracle
- Masters of the elements, shamans command the service of mighty elementals, and even the Elemental Lords themselves. Shamans can Overload their mana in order to rise to the needs of the moment, with their attacks producing varying potency. Shamans can also summon Totems to boost their powers.
Warlock - Gul'dan
- Calling nightmarish Demons to their aid, warlocks are willing to sacrifice their own life and resources to send their minions hurtling at the enemy. Regarding their own lifeblood as nothing more than a currency, warlocks readily trade away their Health to draw additional cards, but must often pay a terrible price for the services of the infernal beings with whom they consort.
Warrior - Garrosh Hellscream or Magni Bronzebeard
- These lords of war use heavy weaponry and deadly attacks to slam and devastate the battlefield. While their skill with armor and shields allows them to soak up the mightiest of blows, their gladiatorial bloodlust brings synergy with Enrage and on-damage effects, sending their minions charging at the enemy.
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