Reposting the entry about Rimuru vs. Ivarage (before he adopted the name Luvelge); the previous version was removed by Reddit because it contained images. Here is the new, more detailed version! 😉
[Regarding the battle between Rimuru and Ivarage—which took place before the latter adopted the name Luvelge—Rimuru sensed the danger the moment he laid eyes on him. Having absorbed Veldanava, Ivarage emanated a "sinister and malevolent aura" so intense that defeating him seemed impossible for anyone. Curiously, however, Ciel noted that Rimuru was not losing; she even confirmed that Ivarage’s Existence Value had reached the one-trillion mark.]
[The fight started off well: Rimuru was able to react to his opponent’s lightning-fast attacks and was, in fact, dominating the encounter. He landed a strike with his sword—a blade of hope wreathed in black flames—which began to gradually drain Ivarage’s energy.]
{Although he hadn’t yet sustained any direct damage, this worried Ivarage, who realized that if things continued this way, there was a real possibility of defeat. Consequently, he decided to unleash his full power—bestowing upon himself the name "Luvelge"—as he grew in size and began to manifest an additional body. Faced with this, Rimuru realized that Ivarage’s form was simply too large to be cut by a sword.}
NOTE: According to Ciel, Rimuru was holding back. Ciel knows Rimuru’s true strength; she wouldn’t have remarked that Rimuru "doesn’t need to hold back" if she weren’t aware of his actual power.
Honestly, the fact that Ciel controls Rimuru’s abilities and takes charge of the combat is even cooler than Rimuru fighting on his own. The way Ciel handled Velgrynd and Michael was incredible. It would have been even more interesting if Rimuru had let Ciel take control of the fight against Luvelge.
That way, we might have seen a greater variety of attack methods, rather than just black flames combined with a sword! I still don’t understand why Rimuru didn’t use Void Collapse, Soul Gluttony, and instant teleportation.
So, folks—considering a confrontation between Ciel (in control of Rimuru’s body and authorities) and Luvelge: who do you think would win the fight?
There is one important detail, however: Rimuru/Ciel cannot use "True Dragon Nucleation." Aside from that, they are free to fight without any other restrictions, employing "Void Collapse" at full power and utilizing techniques such as "Nebula Collapse"—derived from "Void Eater"—or "Imaginary Blade: World of a Thousand Blooming Changes."