The Ogham Alphabet
The Ogham alphabet consists of 25 characters organized into five Aicme (groups of five). Each character is associated with a sacred tree from the Druidic tradition, carrying spiritual meaning tied to the tree's properties, seasonal cycle, and elemental correspondence.
Used as a divination system, Ogham staves are cast in spreads similar to rune casting — Single, Three-Ogham (Past/Present/Future), and Five-Ogham Coelbren.