Poison Swamp is a unique geographical feature of the Green Forest World.
This swamp is unlike the swamps of other worlds; it has absorbed too many corpses of biological weapons, causing the swamp water and muck to often be highly toxic.
Moreover, because of its unique environment, even Alchemy Wizards need a long time and very good luck to cultivate extraordinary microbes from it, and there are at least three kinds inside.
You must understand that ordinary microbes are ineffective against Level 1 Creatures.
Yet, these extraordinary microbes can infect creatures of Level 1 and above.
In front of such microbes, Level 1 Creatures are as vulnerable as ordinary ones.
When this geographic feature was first discovered, Richard's Fire Lizard Battle Group nearly lost a squad. If the squad leader hadn't noticed something was wrong and used a Town Recall Scroll in time to return the squad to the Secret Realm, they all would have perished in the Poison Swamp.
