@Biloutte91 The news you found were already released this morning, then they were removed.
Then changes were made by mistake so that the news appeared again. Now the news is gone (until we activate it again later).
To sum up the situation, the news was released too early (since the Cauldron haven't been released yet, as stated in the video).
So please enjoy the video to get an idea of the new feature, but you may also check it out later, when you can actually see the feature in the game (on beta).
An announcement will be released as well to make sure all players get a good understanding of it.
We apologize for the confusion, everyone!