Kapitel 999: Deceit.

Three Vampires advanced on his position with a speed far superior to his and that of his pursuers. The display gave him confidence that he would be saved.

His confidence was rewarded when a single move cleared away the Vines and submerged the plant soldiers. 

One Vampire brought down both its hands towards the ocean of weaponized plants and made its domain of blood descend upon it. A blood-red wave crashed into the green wave of plants. The blood-red wave won. 

The domain of blood doesn't have any fixed shape so it can flow into gaps and small spaces. But it can change its shape and become deadly very quickly by turning into sharp blades. The Vines beat on the blood domain in futility while the blood tore up the Vines from within. So his immediate problem was solved quickly.