The mountain started to tremble, with the ground shaking and other peaks vibrating in response to the activation.
The heart once activated released a bright ray of golden light, one that rose for hundreds of metres off the mountain, forming a beacon to anyone from far.
The ray of light didn't stop there, and began to release wisps of power. They were all golden in colour at first, started to change to silver, blue, green, and then white the more they elongated. At the end, they became transparent, fading into the world, making it a bit hard to see.
William knew these were tentacles formed by the heart, the things that would start absorbing spirit power from all formations connected to it. As these tentacles elongated and vanished in thin air, he knew it was time to start hitting the hostile formation.