Infernal Ambassadors

1. Slay the elite invaders of Hyjal in the following ways:
Slay Pyrachnis without using the Emerald of Aessina.
Slay Lylagar without taking damage from Lylagar Breath.
Slay Nemesis at Ashen Lake without taking damage from Molten Fury.
Slay Millagazor without taking damage from Gout of Flame.
Slay Galenges before he is weakened a second time.
2. You need to provide your account.
3. ETA: 1 - 2 CDs.

Tips: In order to complete the Achievement, you have to unlock almost the Factions and supporting stuff (Armorer, Moonwell, etc..) on the Molten Front.