Firstly, you will need trinket from last boss in Shattered Halls. ( Figurine of the Colossus - Thottbot: World of Warcraft )
- Get first tier 4 piece bonus. (NOT Really needed)
- Then, go to Zul'Gurub.
- What you want to do is to solo Gahz'Ranka.
- Pull 3 trash packs of tigers
- Stand below the pillar.
- Pull fish boss
Every block will heal you, so the trash is important there.
The drop you want is Tome of Polymorph: Turtle - Thottbot: World of Warcraft
You can get even more from this, sold one for 3500 gold.
Some screens from the solo-kill:
http://www1.picturepush.com/photo/a/...908-103407.jpg
http://www5.picturepush.com/photo/a/...908-103817.jpg
http://www1.picturepush.com/photo/a/...908-103939.jpg
And I want to admit that I just found this, not invented.