Tree of Qliphoth

The Tree of Qliphoth (クリフォトの樹) is a magic channel that connects to the underworld and allows devils to enter the living world. One of the Dark Triad's objectives is the recreation of this channel.

Overview
The Tree of Qliphoth requires World Tree Magic and Dark Magic to grow, so Zenon Zogratis leads an attack on the Golden Dawn squad in order to capture William Vangeance, while Dante Zogratis attacks the Black Bull squad to capture Yami Sukehiro.

Within the inherited knowledge of the Heart Kingdom's princesses, Lolopechka finds memories of a previous opening of the channel and the devastation it caused. The resulting destruction would devastate the entire continent and result in the massacre of 90% of the human population, bringing humanity close to extinction.