Monsters are npcs normally found in dungeons killed by players for experience, items, or quests. While most of them will simply run straight at the player once aggrivated (or "aggroed") there are a few which will cast spells, drain the player's mp, or do other things before running and attacking
Monsters include: (this list will be updated each time another monster article is made.... bear with us.)
Bandit
Berserker Guardian
Black Spirit
Crystal Guardian
Dark Guard
Elite Lich
Elite Ninja
Fallen Spirit
Feline Berserker
Fire Elemental
Fort Guard
General Nefarious
Giant Tarantula
Goblin Demolisher
Goblin Gladiator
Goblin Ironclad
Goblin Karegu
Goblin Mauler
Goblin Vanguard
Jumping Spider
Keeper of Time
Lady of the Night
Mace Guardian
Mummy
Mumra
Ninja
Ninja Master
Olden Priest
Olden Warrior
Rampant Spider
Small Arachnid
Spear Gladiator
Spider Orb Weaver
Timestalker
Timeweaver
The Cogent
Zanzinger