9781646511693 That Time I Got Reincarnated as a Slime 16
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9781975375577 That Time I Got Reincarnated as a Slime 19
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In the aftermath of Rimuru's ascension to Demon Lord, his friends and allies are taken aback by his newfound power, but even more shocked at the return of the dreaded Storm Dragon, Veldora. Meanwhile, the other Demon Lords are all too wary of Rimuru's evolution, which upsets their delicate balance of power and seems to be a harbinger of greater struggles to come.

The powers of the world inevitably take notice when Rimuru rises to the level of Demon Lord. The other Demon Lords call a meeting and invite Rimuru.