A fan on the PTR found a new thing, when a Goblin he killed left an open portal to Greed’s Domain: Through the Treasure Goblin Portal! There are mega fat stacks of gold, chests galore, and even a boss fight with Greed himself, after which a gigantic golden chest is unlocked, from which this lucky guy scored two legendary items.
The guy who found it posted just a short note on Reddit, but he took a bunch of screens and they are delicious.
I found a treasure goblin on the PTR and killed it only to discover he spawned a portal. I clicked it and got transported to the Treasure Realm. It contained a BUNCH of gold, millions even. There is also a boss at the end that drops a chest which contained 2 legendary weapons for me.
Edit: The goblin was found while getting rift keystones in The Silver Spire Level 2
I kept out the two showing Greed himself, if you want to avoid viewing them because *SPOILERS*. They can be seen below. Hint: he’s fat!
Update: Here it is in action. Thanks to Stevan for putting the video together.
Undocumented Patch Changes – There is a thread in the community forum where undocumented 2.1 changes are being collected.
Here is another, much older video from 2012, with 
Abd al-Hazirp talking about Greed’s Domain.
I wonder what's the chance of spawning the portal when you kill a goblin.
Wealth unimaginable!
Seeing as Greed is a Baroness, Greed is indeed a SHE, not a he.
http://youtu.be/pMijHaAHfYQ
Finally! I've been waiting for something like this. When I first played Diablo III I'd actually stop hacking and slashing the goblin and click on the portal, thinking I could jump in. Took me losing several goblins to realize… Ah, I have to kill them before they leap into the portal and I get rewarded for it. *facepalm*
I feel sad they didn't use Gheed.
Doing this without a full group should be a bannable offense.
I can't wait for this.
Ha I actually even read Gheed's realm!
this looks awesome, i've always thought you should be able to go through the gobbys portal since the 1st time i saw one.
it looks as if you can open the giant chest twice? interesting
"Doing this without a full group should be a bannable offense.
I can't wait for this."
100% agree … if you don't have any friends … invite strangers to do this with you and then you will. (but, first make sure they kick ass);)
114million from T5!
I wouldn't have to worry about making big gems on all my chars or rerolling those items that have gotten to 1m+
i was positive about the rumor that one could perhaps enter through the tg-portal!
thanks for verifying.
Gold labels are back?
I've been typing it that way repeatedly, when doing the wiki article or just saving screenshots. Gheed before need, and both before greed, apparently.