Explosions

After saying that, Rean stomped his feet on the ground, which immediately activated the formation. At first, Divine Origin Energy began to gather somewhat slowly. However, as the runes activated one after another, more and more energy gathered in the formation. 

Each side of the formation was responsible for one thing. The north side generated Yin Energy, while the other generated Yang Energy. At the center of the formation, both energies clashed, ultimately wiping each other away. The impressive thing was that the more those two energies clashed, the more Yin and Yang Energy gathered, with more Divine Origin Energy being used for that to happen.

Rean immediately took distance from the formation as his eyes lit up, saying with great glee, "Behold! The Impractical Yin-Yang Clashing Formation! Hahaha!"