Jubei'Thos, a fel orc blademaster, took up leadership of the Blackrock clan orcs in Lordaeron during the Third War. Jubei'Thos didn't join Thrall when he made the new Horde, because of his devotion to the Burning Legion and acceptance of Warlocks in his Clan, something Thrall wouldn't accept. Jubei'Thos considered Thrall weak and manipulative, and that any true challenge to this 'New Horde' would wipe it out utterly.