Some things to notice:
- There is an Uroborus/Ouroboros, the symbol of life and death.
- In the Uroborus there is an Eye, the symbol of wisdom to the Celtics.
- There is also a tree within the Uroborus.
- In the last few episodes the Saga 1, Tarlach eluded that the real Lia Fáil, not the one you see in G3 and in the Saga, is also known as the tree of life, and has nearly limitless power.
Probably a huge stretch but I think that preview might be foreshadowing to more information on the World Tree/Lia Fáil.
[SPOILER="The Book's original image in full size and transparency"]
[Image: http://s.nx.com/s2/game/Mabinogi/C4/event/2014/0314_drama/book.png]
[/SPOILER]