From WoWWiki

Mor'zul Bloodbringer is a level 61 quest giver located just west of the Altar of Storms in the contested territory of Burning Steppes.

He starts the following quests:

• [58] Rage of Blood
• [58] Wildeyes
• [60] Doomsday Candle
• [60] Bell of Dethmoora
• [60] Wheel of the Black March
• [60] Dreadsteed of Xoroth (Dungeon)

See List of Burning Steppes NPCs.