All of his skills really made him an Immortal basically lol. Also does the one that made skills use mana instead of other resources also include those that costs levels like the one's that Ainz hesitates to use in the New World?
His stats are so weirdly high, like an avg of 80 character can group kill a boss so the boss should not be in the range of 300, and he is double of that. He should be a world boss to the world bosses