A few years ago, which is not much time for someone like Eilistraea, she found out that Baphomet was sending his essence into many lower level worlds.
Using their essence people can create a clone of themselves. After creating their clone they can plant a wisp of their consciousness into the clone to control it.
The power of the clone depends on the amount of essence you used while creating it.
With the help of a wisp of consciousness, the clone will be able to move independently. You can give it general instructions and it will act the way you instructed it. Since the clone is made of your essence and consciousness, you can even control it by yourself.
Baphomet was using his essence to create many clones and was sending them to many lower level worlds.
After knowing Baphomet was sending his clones into the lower level worlds she was curious.