Of course, the main "rarity" it has rarely common monsters. Unfortunately, I don't understand sometimes how the number of monsters is selected for unlocked bestiaries, just as the monster's difficulty isn't always the same. eg cyclops drone has 3 stars difficulty, which in my opinion is quite funny, or killing elf x500, elf scout x500 and elf arcanist same x500. The next example? Midnight asura x1000, Dawnfire Asura x2500 and Frost flower asura x1000. Sometimes it's difficult to figure out what CipSoft meant by fixing this.