But unfortunately...
The nearby Thawing Fire Tribe was also eyeing the Ghost Valley covetously. Although they didn't control the Ghost Valley, they had a formidable army stationed on the side of the valley, so whenever the Black Tower tried to make a move on it, the Thawing Fire Tribe would launch a powerful counterattack. After a few attempts, the higher-ups of the Black Tower had despaired. They realized that they would have to thoroughly exterminate the Thawing Fire Tribe if they wanted to control the Ghost Valley.
But was the Thawing Fire Tribe, one of the thirteen tribes, that easy to exterminate?
This tribe had existed for countless years. It had an enormous foundation, making the higher-ups of the Black Tower have to reconsider. The sacrifice needed to eliminate the Thawing Fire Tribe wasn't worth it.
