Talk:Rimuru Tempest/@comment-43661862-20190902205806/@comment-10330822-20191222161205

It was said that Ultimate Skills are produced in the depths of the soul, unlike Unique Skills that are "on the crust" which makes the Ultimate Skills a true manifestation of the soul's power. This means that the skill is unique to the soul itself, and similar souls, that is, similar people, can unlock identical Ultimate Skills should one not be present.

So you are right that Ultimate Skills can exist in more than one person, but they are never at the same time. A previous user needs to die before it can reappear again in another. That is why you never see different Ultimate Skills users use the same Ultimate Skill, or, at the same time. In the rare case where that did happen, the author went out of their way to explain how one was the "core" and the other the "shell", that was Evil Dragon Lord Azi Dehaka. There's no need to do that if it wasn't to explain how two could be in the same place being used by different people. So Rimuru cannot use his skills to duplicate Ultimate Skills that still exist, he has to wait until the user dies. However, if he wanted, he could juse use Void God Azathoth or Greedy King Mammon to steal any Ultimate Skill he wanted by essentially killing the current user. What Prideful King Lucifer does with Metatron and Satan is copy their effects, but they are never to full power, so its not the same thing as having the skill itself, its only a percentage.

The problem with that is the Nihility Energy. On his way to becoming extremely powerful, Rimuru gained access to basically what is "anti-matter/anti-magic" the substance is basically the exact opposite of creation and basically neutralizes anything it touches, which caused him to basically one-shot Yuuki despite Yuuki being the closest thing to him in terms of power. Even Guy Crimson, who eventually reaches Yuuki's level of power after the main story ends admits that he doesn't cheerish a serious fight with Rimuru because he doesn't like to fight battles he knows he can't win. So Rimuru streaching his wings would probably never happen because there is no one strong enough to fight him at his full power and Rimuru is not one to show off is there is no need too.