Si Kongchen had been trying to find a way to find out All Beings Base's secret, but before he could come up with an idea, All Beings Base people revealed the secret themselves. By doing that, they had given him a perfect reason to attack their base. It was like a gift and he, of course, intended to make good use of it.
Also, Wu Chengyue had left Sea City Base. That was just what Si Kongchen wished for! After all, Sea City Base had a strong army and powerful weapons. Attacking Sea City Base would consume some of his own weapons. Now, as Wu Chengyue had left Sea City Base, he no longer had the right to use Sea City Base's weapons to defend himself, meaning that he was now much easier to deal with than before.
The woman from All Beings Base had destroyed half of his weapons, and Si Kongchen felt wrathful every time he thought about that. He had so much anger in his heart, and he couldn't give vent to it.