After a few rounds, they knew that the Lord of Dawn was not weak. If they wanted to destroy him, it would be difficult for them not to mobilize the entire alliance.
However, there was currently the black tide. It would take at least a month or two to three months for it to end.
After such a long period, it was very likely that the Kingdom of Dawn would once again grow and become more difficult to deal with.
For this reason, they had planned for a very long time and decided to take the risk to attack the Kingdom of Dawn during the black tide period.
They went the other way this time because they would earn more if they succeeded despite the high risk.
Since the Kingdom of Dawn was able to provide five million Skylight Flowers, they naturally did not lack the Divine Pure Grass. If they could snatch all of them, then they would have an additional source of income.