The Heart of the Forest is a location at the center of the Wandering Forest. It is the epicenter of the Vitae
Virus generator's impact crater, and surrounds the ruins of an HRP Sanctuary. The water in the gymnasium pool became infected with the Vitae Virus, which contaminated the greenhouse plants and the resident microorganisms, resulting in the evolution of giant flora and fauna like the giant tardigrade and weeping bird-catcher. Any beings who attempt to enter the heart of the forest are either killed or "purified" by The Mother, a mysterious being evolved from the resident Muthr unit after it ingested Vitae Virus-infected water.