In a new plane...
The different planes
As you know, there are a few planes of existence. First of all the one you came from, the Outlands. Then there is the one you are on with what were called angels and demons called the Celestia plane. The third on you know of is the dragon plane, or the Beastlands which you visited once where you collected some dragon eggs. Of course there are other planes but they are so difficult to get to no one has tried in the memorable history of Celestia.
The planes are on different levels which shift over each other. Imagine three maps one on top of the other and there are ways to switch between the maps. Over time they displace so if you travel from one to the other and then back there is no guarantee you will be in the same place as the corresponding places change as the planes do.
Time works differently too from one plane to another. In Celestia a month equals one day on the Outlands. The dragon plane is even slower with a year in the dragon plane equaling a day in Celestia. People have tried to appear immortal by going to a higher plane and coming back to their own plane when needed but it has never ended well with them either getting lost or going insane from the strain of planewalking.