The Hostile Elder Oak is an enemy encountered in EarthBound in the Deep Darkness area. It is an improved version of the Territorial Oak with purple leaves and a greener trunk. The Hostile Elder Oak attacks using both regular and PSI moves. Fortunately, the only PSI moves this creature knows are Brainshock α and PSI Magnet α. Its weakness is PSI Fire. Like the Territorial Oak, once defeated this beast will burst into flames causing damage to the party.