The wonderful and annoying thing about this card is that it's all over the place. On one hand it could mean great fortune is coming to the reader, on the other hand it could mean that ill fortune is showing up. On one hand it could be about what goes around comes around and on the other it could be about random chance. Either way, big change is coming and for better or for worse, the reader is called to be willing and ready to "change as fast as god" - wise words from don Miguel Ruiz.
There are a lot of symbols in this card including the four elements/suits/directions of the tarot, the tarot itself, connection to spirit, connection to the underworld, and many more that I have personally yet to understand. When big change happens, there are many elements that play into it. Some that we may never know about or understand, and others that make perfect sense. While it can be useful to understand why and how change has happened, our personal response to change is what will have a lasting impact on our current situation and how it either helps or harms us. Another opportunity to practice being in choice rather than reaction.