Bring 10 Vials of Hatefury Blood and 1 Lesser Infernal Stone to Menara Voidrender in the Barrens.
The next components are found in Desolace, far to the west of the Barrens and even the Stonetalon Mountains.
There, chaos still reigns after the Sundering. Both your strength and cunning will be tested there--you will face creatures of hatred and also of the Burning Legion.
From the Hatefury satyr in the northeast, bring me their blood. From the lesser infernals in Mannoroc Coven, bring me a lesser infernal stone.
We will use both in the construction of your robe.