Free High Chief Icemist using the Anub'ar Prison Key and assist him in defeating Under-king Anub'et'kan.
Recover a Fragment of Anub'et'kan's Husk and return it to Overlord Agmar at Agmar's Hammer in the Dragonblight.
<Banthok hands you the prison key.>
You must hurry, <name>. Take the key and use it to unchain my father from the Anub'ar prison. Once he is freed, assist him in destroying the Anub'ar leader, Under-king Anub'et'kan. When the Under-king is defeated, take from his chitinous carapace a fragment as a trophy to present to the Horde at Agmar's Hammer. Let Agmar see the might of the High Chief!