Living Oak

The Living Oak is a massive tree located in the Vluxyhm Forest, forming up a large amount of the forest. They're a sentient tree, capable of moving it's branches and roots freely to an extent, and are aware of nearby threats or people.
Rarely seen outside of their native forest, those that have managed to thrive and grow are ancient trees from well over three centuries. One of the oldest examples is the Living Oak growing in the Academy's courtyard, often referred to as the watcher.
Despite being seemingly immobile and threatened by means like fire, Living Oaks have several forms of defence which has let them thrived: mainly in the form of bark as strong as industry-grade metal, or the releasing of water droplets inside the leaves to dampen itself and extinguish fires.