Warchief Rend Blackhand is currently the leader of the Fel Horde's forces within the Blackrock Mountain. Blackhand is currently tasked with cutting off the Dwarves from their allies, the Humans of Stormwind who are apart of the Arathor Nation.
He is a necessary hero for teal to use as he will become effective with other fel orc blademasters from Hellfire Citade, should the fel horde succeed in destroying stormwind. However, should Rend Blackhand's base in Blackrock Mountain be destroyed, Rend will become unrevivable and should be protected for future usage. He is a powerful hero and should be kept safe and used effectively against the Fel Horde's enemies.