Taldaram

Prince Taldaram, a San'layn, is the second boss found in Ahn'kahet. His business in Ahn'kahet other than siphoning power is unknown.

=Adventure Guide=

After Kael'thas's failed assault against the Lich King, some of his greatest blood elf followers were slaughtered and raised into undeath as darkfallen. Prince Taldaram is one of these cunning and bloodthirsty vampiric beings. Always seeking to please the Lich King, he has entered the war-torn depths of Ahn'kahet in search of lost nerubian relics that can empower the Scourge's murderous ranks.

=Icecrown Citadel=

Taldaram, along with fellow blood-princes Keleseth and Valanar, has returned in Icecrown Citadel as members of the Blood Prince Council. The three princes were raised in undeath by the Lich King to avenge themselves upon their slayers and to act as bodyguards for Blood-Queen Lana'thel, the blood-queen of the San'layn.

See WoWPedia