Humanity has not been kind to nature, so it is repaying it the same way. This page of our Tower of Fantasy guide describes a deadly plant called Robarg.
Where to find the boss?
You can find World Boss Robarg in 1st land where you start the adventure (Astra). The monster is in a canyon in the Southern Ring Ranges. There is a teleport in the area.
Features and weaknesses
Due to the location of the boss and relatively low threat level, Robarg will likely be your 1st opponent with the rank of World Boss. The monster is weak to fire. In addition, it does not move, which gives you a chance to take a break from combat.
The boss can poison a large area. To do this, he uses the ability to call Needlebees (very large "bees"). One of Robarg's other powers is summoning roots that suddenly sprout from under the ground. Also, when the plant is in danger, it can shoot large spheres that deal huge damage.