As soon as Valeu's body hit the ground, Rean grabbed and protected him with a layer of Spiritual Energy. At the same time, he sent a wave of Light Element inside, stopping the bleeding and driving out the Decaying Fog Energy.
Roan saw that and nodded before giving another order.
"Retreat now! With this amount of Decaying Energy, the Decaying Demon Beasts from deep inside will appear at any second."
Everyone nodded, and they immediately dashed away. Sure enough, around a minute after Rean's group left, the area began to be filled with Decaying Devourers! That was to be expected since this was close to their territories.
Rean's group quickly exited that decaying cave and disappeared into the Decaying Fog. With the Surge's appearance, it became even harder to see or use one's Spiritual Sense. Even if Roan didn't know about the Decaying Devourers' territory, he wouldn't have chosen that path anyway. After all, it wasn't as good as the one he felt before.