This appears not to be an egg, but a seed. How curious.
The farir are a race of forest inhabitants, not often seen by magi. These creatures are the forest's manifestation of health and life, and exist only so long as the forest that created them still lives. Farir are often leaf-like in appearance and they change according to their environment. The seasons also bring a change about them, for when the forest is in full bloom, so too are these creatures. Farir are commonly mistaken for leaves, and they change colors just as the woods do. When autumn comes, farir are indistinguishable from real leaves due to their brilliant colors. In winter, they become stick-like, shades of what they were, and appear to be skeletons of leaves. If their forest is unhealthy, the farir begin to disappear, as they are spiritual creatures and only live so long as their forest does. Coming across one of these creatures depends on the magi, because only those with good intentions towards nature may see them. The magi believe that glimpsing one of the farir is a good omen, and will bring fair fortune.