Green Scepter Shard is a quest item, part of quest chain to open the Gates of Ahn'Qiraj.
This item is given to players by after he is cleansed of the corruption by in Nighthaven.
Green Scepter Shard as a quest objective
This is part of the fork of quest chain:
Patches and hotfixes
Patch 1.9.0 (03-Jan-2006): Added