How to reach 'The Void' and other SoD zones
The Seeds of Destruction expansion pack adds in a bunch of revamped/remade/repolished zones as it's heavily tied into the theme of time travel. Many of the zones from previous expansions we get to revisit with enemies and loot scaled up to level 85.
To reach the Seeds of Destruction zones you'll need to travel to the Plane of Time and then from there click on the portal that takes you to The Void. But before that - there's a faster way to get to Plane of Time than what you're used to! Shown in my picture above you can find a Herald of Druzzil Ro in the Plane of Knowledge inbetween the Soul Binder and Small bank.
If you can't find the Herald of Druzzil Ro I recommend you use my map below for some extra guidance.
Speak with the Herald of Druzzil Ro and tell him 'time' he'll then port you to the center area of Plane of Time. Now that you're in the Plane of Time you'll need to find the purple teleporter device that will take you to The Void after you click on it. It's really close to the central pillar that you port into the zone at. A picture of the teleporter device can be found below.
To return to Plane of Knowledge speak with the Herald of Druzzil Ro that's inside the Plane of Time. He'll be able to provide you with a way back.