Originally Posted by
186eclipse
Taken directly from first wowhead post on the item.
By Spartz (127 – 0) on 2010/12/12 (Patch 4.0.3)
If you're into battlegrounds; save this item!
When you go into a battleground, you can spawn yourself a guardian, who will help you fight opponents. Sadly, the fighter is only level 11, but it has some cool tricks. When anyone uses stealth, your guardian will keep following it; when they use speed-ups, your guardian will catch up with them and fight them!
It's awesome! And I'm sure they'll fix this soon, so have fun with it while it lasts.