Magic of Ynys Pryd

The magic of Ynys Pryd isn't all that complex.

There are three major elements, The Land, The Sea and The Sky.

Land magic is the embodiment of Earth. People who have a talent for this particular element know how to capture the following essences of magic and lore.
Gemology
Herbology
Animal Lore
Healing
Fire

Sky magic is the embodiment of Air. People who have a talent for this particular element know how to capture the following essences of magic and lore.
Weather magic
Astrology
Sun Lore and Magic
Telepathy
Night Magic

Sea magic is the embodiment of Water. People who have a talent for this particular element know how to capture the following essences of magic and lore.
Chaotic forces of nature
Moon Lore and Magic
Dreams

Aether/Void is the embodiment of Spirit. People who have a talent for this particular element are a rare breed and extremely powerful, as they also have the knowledge of the other three elements.
They know how to capture the following essences of magic and lore.
Transformation
Divination
Astral Travel

Note: Some witches have been known to be void of any ability. These witches are known as mundanes.
There are also witches that straddle the between. Having strong abilities in two elements.