I know it is definitely in from version 0.8 onward.
It is related to the quest where you need to find the four broken key parts. It's in that new area you open up with them. I do think that area may already have been added in 0.7 but I can't say out of my head.
If there is a new stone monument in the big desert you can interact with, before the entrance to the ruins. (The place withe the six flames and gate) Then it should be in 0.7 already.