If the War Head was a key, and they knew it was a key, then why did they want to kill it so bad? Because it was terrorizing their city? It didn't seem like it. It seemed like everything was quite contained. Even when the Rotting War Head started mass spawning zombies and rotting flesh, it had all remained within the barriers of the ruin.
"Do you know what Spirit was tormenting the Rotting War Head?" Grey asked.
"No, we do not." Joelle shook her head.
Grey's gaze flickered. He, of course, did know. It was the Mechanical Jaw Spirit.
In that case, it was more likely that the War Head had been trying to establish connection with the Old Ones, while the Mechanical Jaw Spirit was trying to stop it.
By defeating it, Grey had probably tossed something into a bit of an imbalance and the Mechanical Jaw Spirit chose coming with him over maintaining that balance for the world instead.
