What you need: Cleared ZA (at least Lynx dead) from your guild or another. Try asking in trade chat if anybody has killed ZJ so you can "look around", it works.
Go to lynx bosses room. On the right hand side if you were facing him there is an Urn, and if you look carefully you can loot inside of it. Inside is a random epic, either a bear mount, ZA ring (REALLY GOOD RINGS) or something of that kind.
The thing is, almost NOBODY realizes this urn loot is here! Most guilds clear the whole place without knowing about it. You can get yourself up to two epics a week doing this.
Enjoy!
edit: here's the urn, you have to look INSIDE it.
edit 2:
IF the group has cleared it more than a few hours ago, some mobs will respawn. Here is the workaround:
Get a soulstone, run in and up to almost hexxar's room. Jump down and wall jump up around hexar's platform. Jump into the water, then run up to the back door that opens AFTER you kill Lynx (if its open, go in). If it's closed, walk around on the wall's ledge towards the normal entrance, wall jump up (above where the normal entrance is), jump down and RUN LIKE HELL, go inside and hang a hard right. Soulstone up when the pat is on the other side of the room. Then collect your loot! (just did this).