Death Knight (шлема нет пока что)

Tank 2P Bonus - Increases the damage done by your Death and Decay ability by 20%.
Tank 4P Bonus - When you activate Blood Tap, you gain 12% damage reduction from all attacks for 10 sec.

Melee 2P Bonus - (Updated) Your Obliterate and Scourge Strike abilities deal 10% increased damage., and your Heart Strike ability deals 7% increased damage.
Melee 4P Bonus - Whenever all your runes are on cooldown, you gain 3% increased damage done with weapons, spells, and abilities for the next 15 sec.

Druid

Restoration 2P Bonus - The healing granted by your Wild Growth spell reduces 0% less over time.
Restoration 4P Bonus (Rejuvenation) - Each time your Rejuvenation spell heals a target, it has a 2% chance to jump to a new target at full duration.

Balance 2P Bonus - (Updated) When you gain Clearcasting from your Omen of Clarity talent, you deal 15% additional Nature and Arcane damage for 6 seconds.
Balance 4P Bonus - (Updated) Your critical strikes from Starfire and Wrath cause the target languish for an additional 5% of your spell's damage over 4 seconds.

Feral 2P Bonus - Your Swipe (Bear) and Lacerate abilities deal 20% additional damage and the cost of your Rip ability is reduced by 10 energy.
Feral 4P Bonus - Your Enrage ability no longer decreases your armor and instead decreases all damage taken by 12%, and the periodic damage done by your Rake ability can now be a critical strike.

Hunter

2P Bonus - Your Auto Shots have a 5% chance to cause you and your pet to deal 15% additional damage for until cancelled.
4P Bonus - (Updated) When your Viper Sting, Serpent Sting, and Wyvern Sting abilities deal damage, you have a 5% chance to gain 20% attack power for 10 seconds.

Mage

2P Bonus - (Updated) Your Hot Streak, Missile Barrage, and Brain Freeze talents also grant you 12% haste for 5 seconds when the effect of the talent is consumed.
4P Bonus - (Updated) Your Mirror Image ability also causes you to deal 18% additional damage for 30 seconds.

Paladin

Holy 2P Bonus - (Updated) While your Divine Illumination talent is active, your healing spells are increased by 35%.
Holy 4P Bonus - (Updated) Your Holy Shock spell causes the next Holy Light you cast within 10 sec to have 0.3 sec reduced cast time.

Protection 2P Bonus - Your Hammer of the Righteous ability deals 20% increased damage.
Protection 4P Bonus - When you activate Divine Plea, you gain 12% dodge for 10 sec.

Retribution 2P Bonus - (Updated) Your melee attacks have a 40% chance to reset the cooldown on your Divine Storm ability.
Retribution 4P Bonus - (Updated) Your Seals and Judgements deal 10% additional damage.

Priest

Healer 2P Bonus - (Updated) Your Flash Heal critical strikes cause the target to heal for 25% of the healed amount over 9 sec.
Healer 4P Bonus - (Updated) Your Circle of Healing and Penance spells have a 20% chance to cause your next Flash Heal cast within 6 sec to reset the cooldown on your Circle of Healing and Penance spells.

Shadow 2P Bonus - (Updated) The critical strike chance of your Shadow Word: Pain, Devouring Plague, and Vampiric Touch spells is increased by 5%.
Shadow 4P Bonus - (Updated) Reduces the channel duration and period of your Mind Flay spell by 0.5 seconds.

Rogue

2P Bonus - (Updated) Your Tricks of the Trade ability now grants you 15 energy instead of costing energy.
4P Bonus - (Updated) Gives your melee finishing moves a 13% chance to add 3 combo points to your target.

Shaman
Restoration 2P Bonus - Your Riptide spell grants 20% spell haste for your next spellcast.
Restoration 4P Bonus - Your Chain Heal critical strikes cause the target to heal for 25% of the healed amount over until cancelled.

Elemental 2P Bonus - Your Lightning Bolt spell reduces the remaining cooldown on your Elemental Mastery talent by 1 sec.
Elemental 4P Bonus - (Updated) The cooldown on your Lava Burst ability is reduced by 1.5 seconds.

Enhancement 2P Bonus - When you activate your Shamanistic Rage ability you also deal 12% additional damage for 15 sec.
Enhancement 4P Bonus - Each time the beneficial effect of your Maelstrom Weapon talent reaches 5 charges, you have a 15% chance to gain 20% attack power for 10 sec.

Warlock

2P Bonus - (Updated) The critical strike chance of your Shadowbolt, Incinerate, Soulfire, and Corruption spells is increased by 5%.
4P Bonus - (Updated) Each time your Immolate and Unstable Affliction spells deal periodic damage, you have a 15% chance to gain 10% damage done by you and your pet for 10 seconds.

Warrior

Protection 2P Bonus - Your Shield Slam and Shockwave abilities deal 20% increased damage.
Protection 4P Bonus - Your Bloodrage ability no longer costs health to use, and now causes you to absorb damage equal to 20% of your maximum health. Lasts until cancelled.

Melee 2P Bonus - (Updated) When your Rend and Deep Wounds abilities deal damage you have a 2% chance to gain 20% attack power for 10 seconds.
Melee 4P Bonus - (Updated) You have a 30% chance for your Bloodsurge and Sudden Death talents to grant 2 charges of their effect instead of 1, reduce the global cooldown on Execute or Slam by 0.5 seconds, and for the duration of the effect to be increased by 100%.