Within the Hall of Command you will find the schools of blood, frost and unholy. Each school has a trainer that can provide you with knowledge in the various dark arts.
I, Lord Thorval, am the headmaster of the school of blood. Lady Alistra reigns over the unholy and the arch-lich, Amal'thazad, holds dominion over frost.
You must return here whenever you gain power and train!
Just a reminder that death knights are unique... One trainer for each of the three schools...
-  In Service Of The Lich King
-  The Emblazoned Runeblade
-  Runeforging: Preparation For Battle
-  The Endless Hunger
-  The Eye Of Acherus
-  Death Comes From On High
-  The Might Of The Scourge
-  Report To Scourge Commander Thalanor
-  The Scarlet Harvest
-  If Chaos Drives, Let Suffering Hold The Reins
-  Gothik the Harvester
-  The Gift That Keeps On Giving
-  An Attack Of Opportunity
-  Massacre At Light's Point
-  Victory At Death's Breach!
-  The Will Of The Lich King
- Side quest:  The Power Of Blood, Frost And Unholy
-  The Crypt of Remembrance
- Side quest:  The Plaguebringer's Request &  Noth's Special Brew &  More Skulls For Brew
-  Nowhere To Run And Nowhere To Hide &  Lambs To The Slaughter
-  How To Win Friends And Influence Enemies
-  Behind Scarlet Lines
-  The Path Of The Righteous Crusader,  Brothers In Death
-  Bloody Breakout
-  A Cry For Vengeance!
-  A Special Surprise
-  A Sort Of Homecoming
-  Ambush At The Overlook
-  A Meeting With Fate
-  The Scarlet Onslaught Emerges
-  Scarlet Armies Approach...
-  The Scarlet Apocalypse
-  An End To All Things...
-  The Lich King's Command
-  The Light of Dawn
-  Taking Back Acherus
-  The Battle For The Ebon Hold
-  Where Kings Walk or  Warchief's Blessing