Here are all the legendaries, class and Death Knights from the Knights of the Frozen Throne expansion.
Druid Death Knight
Malfurion the Pestilent and the replacement hero power, Plague Lord.
Druid Class Legendary
Hadronox, with a Deathrattle that summons all your taunt minions that died this game.
Hunter Death Knight
Deathstalker Rexxar and the Build-a-Beast replacement hero power.
Hunter Class Legendary
Professor Putricide, puts up a random secret every time you play a secret.
Mage Death Knight
Frost Lich Jaina and the replacement hero power, Icy Touch.
Mage Class Legendary
Sindragosa, with the battlecry summoning two Frozen Champions.
Paladin Death Knight
Uther of the Ebon Blade and The Four Horsemen replacement hero power.
Paladin Class Legendary
Bolvar, Fireblood, comes with a Divine Shield and gains +2 attack for every friendly Divine Shield lost.
Priest Death Knight
Shadowreaper Anduin and replacement hero power, Voidform.
Priest Class Legendary
Archbishop Benedictus, shuffles a copy of your opponent’s deck into your deck when played.
Rogue Death Knight
Valeera the Hollow and replacement hero power, Death’s Shadow.
Rogue Class Legendary
Lilian Voss, replaces all the spells in your hand with random spells from your opponent’s class when played.
Shaman Death Knight
Thrall, Deathseer, and the replacement hero power, Transmute Spirit.
Shaman Class Legendary
Moorabi, whenever you freeze a minion you receive a copy of it to your hand.
Warlock Death Knight
Bloodreaver Gul’dan and the powerful replacement hero power, Siphon Life.
Warlock Class Legendary
Blood-Queen Lana’thel, has Lifesteal and also +1 attack for each card you’ve discarded in the game.
Warrior Death Knight
Scourgelord Garrosh comes with a powerful weapon and the new Hero Power, Bladestorm.
Warrior Class Legendary
Rotface, this minion summons a random legendary whenever it survives damage.
Neutral Legendary Cards
I’m seeing a theme here with the incremental mana costs, similar flavor text, and the incremental deck buffs.
Maybe there is a deck to be found that plays all these Prince cards together!
A couple more neutral legendaries:
and the Death Knight cards generated by The Lich King:
