Monsters

Monsters are creatures that mutated from normal creatures in presence of mana, which pose threat to people in the world.

Overview
Monsters are the result of sudden mutations in normal animals. If they are lucky enough to grow in numbers, establish themselves as a new species, and develop intellect over the generations, they become fiends. But apparently, many creatures that possessed intelligence but still attacked humans are referred to as monsters; there are also cases of fiends growing more savage and brutal over the generations, reverting back into monsters. Due to the fact that monsters thrive on Mana, areas with higher mana density like the Demon Continent tend to have more powerful monsters.

As such, the Adventure Guild's Rank C and above requests are mostly subjugating a certain group of monsters or gathering parts of monsters for crafts. Adventurers usually have books on how to handle different kinds of monsters in their current region like <> found in the Greyrat Household in Buena Village.

There are also plant-based monsters called Treants, which are typically ordinary plants that had sucked up too much magical energy and mutated into violent creatures. There are a considerable variety of specific monsters that fell into this broad category, but their basic patterns of behavior are very similar: they pretended to be normal trees and attacked anyone who came too close. After some time, they produce seeds that grow into more of their kind.

Demon Continent
""First, there are no roads. There's a path, but it's nothing like the ones in Milis Continent and Central Continent, paths with few monsters that are safe don't exist anywhere. No matter where you walk around, C rank or above monsters just come out to attack you.""

- -Geese Nukadia to Paul Greyrat on the monsters of the Demon Continent