Difference Between a Boss Monster and a Mob, System Mission
One could also see a vast difference in strength between something that was a Boss Monster and something that was not a Boss Monster. For example, a Lvl 110 S-Rank Boss Monster would have stats around 200,000-225,000, whereas an S-Rank Mob Monster would have stats near the very beginning of the S-Rank, roughly coming in at 40 or so thousand. This was due to a few different things, with the most important one being 'Unique Skills.'
Every living thing in the world was born with some sort of Skill, whether it be a useful or useless one. However, there were those who were born with multiple skills, or even multiple skills and a Unique Skill. Having or not having a Unique Skill could very well alter the course of your life in Utavia. After all, they were skills fine-tuned to every aspect of your existence. Simply put, Unique Skills were what made a diamond in the rough truly shine. Without it, you would just be another, very rough diamond.