As Du You left, the Dark Swamp on the ground quickly dissipated.
Yes, Du You can now disperse his own Dark Swamp. This was a discovery made after using the skill.
Upon reaching the third-tier skill, Du You's Dark Swamp and Hellfire Thunder both received significant upgrades. Not only in terms of power and range, their control became much easier as well.
Both the Dark Swamp and Hellfire Thunder can now be maintained for 24 hours. Such a duration is already highly effective in battle. Most importantly, he can disperse it himself.
In the past, once his Dark Swamp and Hellfire Thunder were released, they had to be left as they were. Either they had to be destroyed by other means, or they had to fade away automatically when time was up.
But now it's different. Du You can actively disperse them. It may not seem useful, but for trap-type skills, the ability to dismantle means they can be used more flexibly and expose him less.