Draenor Perk

Draenor Perks were specialization-specific passive abilities gained while leveling from 90 to 100 in Warlords of Draenor, improving existing abilities.

Each specialization had access to 4 perks, granted upon reaching levels 92, 94, 96 and 98. Unlike other abilities perks did not have a fixed level at which they were acquired; instead, upon reaching one of these levels, a perk would be randomly selected from those not yet known by the player. Perks would also be learned by the character's currently inactive specializations, meaning that by level 98 the character will have learned all perks for their class.

The Draenor Perks were retired when patch 7.0.3 went live, with many of their effects added into the existing abilities.

Perks
 

Death knight

 * Blood
 * Enhanced Bone Shield
 * Enhanced Death Coil
 * Enhanced Death Grip
 * Enhanced Rune Tap
 * Frost
 * Empowered Obliterate
 * Empowered Pillar of Frost
 * Improved Death Grip
 * Improved Runeforges
 * Unholy
 * Empowered Gargoyle
 * Enhanced Dark Transformation
 * Enhanced Fallen Crusader
 * Improved Soul Reaper

Druid

 * Balance
 * Empowered Moonkin
 * Enhanced Moonkin Form
 * Enhanced Rebirth
 * Enhanced Starsurge
 * Feral
 * Enhanced Berserk
 * Enhanced Prowl
 * Enhanced Rejuvenation
 * Improved Rake
 * Guardian
 * Empowered Bear Form
 * Empowered Berserk
 * Enhanced Faerie Fire
 * Enhanced Tooth and Claw
 * Restoration
 * Empowered Ironbark
 * Empowered Rejuvenation
 * Enhanced Lifebloom
 * Enhanced Rebirth

Hunter

 * All specializations
 * Enhanced Camouflage
 * Beast Mastery
 * Enhanced Basic Attacks
 * Improved Beast Cleave
 * Improved Focus Fire
 * Marksmanship
 * Enhanced Aimed Shot
 * Enhanced Kill Shot
 * Improved Focus
 * Survival
 * Empowered Explosive Shot
 * Enhanced Entrapment
 * Enhanced Traps

Mage

 * Arcane
 * Enhanced Arcane Blast
 * Improved Arcane Power
 * Improved Blink
 * Improved Evocation
 * Fire
 * Enhanced Pyrotechnics
 * Improved Flamestrike
 * Improved Inferno Blast
 * Improved Scorch
 * Frost
 * Enhanced Frostbolt
 * Improved Blizzard
 * Improved Icy Veins
 * Improved Water Elemental

Monk

 * All specializations
 * Enhanced Roll
 * Enhanced Transcendence
 * Brewmaster
 * Improved Breath of Fire
 * Improved Guard
 * Mistweaver
 * Improved Life Cocoon
 * Improved Renewing Mist
 * Windwalker
 * Empowered Chi
 * Empowered Spinning Crane Kick

Paladin

 * All specializations
 * Improved Forbearance
 * Holy
 * Empowered Beacon of Light
 * Enhanced Holy Shock
 * Improved Daybreak
 * Protection
 * Empowered Avenger's Shield
 * Improved Block (paladin ability)
 * Improved Consecration
 * Retribution
 * Empowered Divine Storm
 * Empowered Hammer of Wrath
 * Enhanced Hand of Sacrifice

Priest

 * Discipline
 * Empowered Archangel
 * Enhanced Focused Will
 * Enhanced Leap of Faith
 * Enhanced Power Word: Shield
 * Holy
 * Enhanced Chakras
 * Enhanced Focused Will
 * Enhanced Leap of Faith
 * Enhanced Renew
 * Shadow
 * Enhanced Mind Flay
 * Enhanced Power Word: Shield
 * Enhanced Shadow Orbs
 * Enhanced Shadow Word: Death

Rogue
</li>
 * Assassination
 * Empowered Envenom
 * Enhanced Crimson Tempest
 * Enhanced Vendetta
 * Improved Slice and Dice
 * Combat
 * Empowered Bandit's Guile
 * Enhanced Blade Flurry
 * Improved Dual Wield
 * Swift Poison
 * Subtlety
 * Empowered Fan of Knives
 * Enhanced Shadow Dance
 * Enhanced Stealth
 * Enhanced Vanish

Shaman
</li>
 * All specializations
 * Enhanced Unleash
 * Improved Reincarnation
 * Elemental
 * Enhanced Chain Lightning
 * Improved Lightning Shield
 * Enhancement
 * Improved Flame Shock
 * Improved Maelstrom Weapon
 * Restoration
 * Improved Chain Heal
 * Improved Riptide

Warlock
</li>
 * Affliction
 * Empowered Corruption
 * Empowered Drain Life
 * Enhanced Haunt
 * Improved Drain Soul
 * Demonology
 * Empowered Demons
 * Empowered Doom
 * Empowered Drain Life
 * Enhanced Corruption
 * Destruction
 * Empowered Immolate
 * Enhanced Chaos Bolt
 * Enhanced Ember Tap
 * Enhanced Havoc

Warrior
</li></ul>
 * Arms
 * Enhanced Rend
 * Enhanced Sweeping Strikes
 * Improved Die by the Sword
 * Improved Recklessness
 * Fury
 * Empowered Execute
 * Enhanced Whirlwind
 * Improved Die by the Sword
 * Improved Recklessness
 * Protection
 * Improved Block (warrior ability)
 * Improved Defensive Stance
 * Improved Heroic Leap
 * Improved Heroic Throw

Speculation
The introduction of the Draenor Perks may have been partly intended to compensate for a lack of new abilities when leveling from 90 to 100. With the expansion's substantial pruning to the current list of abilities, and larger than ever range of levels across which to spread their acquisition, it was likely that few if any new non-talent abilities would be awarded between 90 and 100. The Perks may have therefore made sense as a form of ability progression which did not require the player to be missing substantial pieces of their skillset until they reached max level; if several key abilities were learned only above level 90, the limited pool of pre-90 abilities might have left lower-level play unbalanced and monotonous.