Beaststalker's Mantle

Part of the Hunter-aimed Beaststalker Armor, a Dungeon Set 1 gear set.

Source
This item drops from Overlord Wyrmthalak in Blackrock Spire.

As a quest objective
This item is an objective of Anthion's Parting Words.

Please see the Dungeon Set 2 page for a walkthrough on upgrading your Set 1 pieces to Set 2.