Grandmother Oak is the oldest and largest tree on Caput Tatiium, located on the lands of the Saraw Tribe. Like the other Scions of Heaven, it was brought into the Physical Realm by Brahma almost 35,000 years before Book 1, and has its origins in Heaven's Arcane Garden. Grandmother Oak is the largest and oldest tree on the entire planet of Caput Tatiium, and the area around it is considered sacred ground by every tribe on the entire planet. However, none revere it to the same extent as the Saraw Tribe, which believes the tree to be the ancestor to all trees on Caput Tatiium. Like the other Scions of Heaven, Grandmother Oak's roots once contained a portal to the Nether Realm, but the Gods closed this off over 20,000 years ago. Nevertheless, the tree still has magical properties, and the Saraw Tribe's shamans brew a special oil from its acorns that has healing properties. Under the shade of Grandmother Oak, the Saraw conduct almost all of their traditions, including the galaxy-renowned Saraw Homecoming.