Massive Treasure Chestedit this page
From WoWWiki
The Massive Treasure Chest is located Terokkar Forest. [43, 76] You're provided with the key to open the chest when you accept the quest.
Objective of
Contains [Dread Relic] for the quest 
[66] The Dread Relic.
Notes
Opening this chest will cause dozens of zombies to appear all around the chest (about 20yds away) forming a circle around you. They are fairly weak, but it's wise to either run quickly away or have some AoE with you.
