Fang Jie wasn't worried about the situation on the side of the Dark Forest at all, because these Druids were clearly restrained by the Undead.
Their decaying Tree Demons exchanged defense for deadly poison and duration of existence. However, the poison had no effect on the Undead; instead, it allowed the Undead to easily harm them.
Otherwise, a normal Black Iron level Tree Demon summoning wouldn't be something that an Apprentice Level Skeleton could break through easily.
But now it was different, every attack left a deep wound on the Tree Demons; a few more hits would suffice to chop them down. Unfortunately, the Tree Demons had also lost their ability to heal.
So the existence duration of these Tree Demons wasn't much of an advantage here either.
Even continuously fighting could eventually lead to various problems with the plants here. As for specifics, Fang Jie wasn't sure, but continuing down this path would gradually wear out most of the Druids.