The left turn in the first room in Caligrase has the humanoid, Rouge Leader.
The Rouge Leader is immune to fall damage. So the best thing to do is go all out on him. His charged attack is close rang and it is easy for mages to kill him. But watch out if you're a fighter, because his charged attack knocks you back with tons of damage. All though beginners find him a nuance, if you know what your doing, he can be killed in seconds.
This fellow has many things to drop including gems. But isn't what you want to fight for Junk Collecting.