Not all Spirit Advancements trigger an evolution, but Karan and Zara did trigger an evolution when they reached the pinnacle rank of Archaic Spirit. It meant that when the spirit advanced to the pinnacle rank, it would undergo an evolution.
That was what happened to Karan and Zara. Doombringer triggered an evolution that was higher than it was.
The dead bodies that formed a small mountain were covered in a dark-red glow. The dark-red glow spread out, reaching out to the other piles. It kept spreading until the requirement corps was fulfilled.
The bodies burst into dark-red particles, then shot toward Doombringer. The big spirit was covered in dark-red particles, forming a cocoon. Doombringer was enveloped in dark-red light, forming a cocoon.
Then the cocoon started to float. It slowly rose into the air, going up into the sky. That was when the surroundings started to be influenced. The sky darkened.
