Understanding Rimuru's Summoning of the Primordial Black: Fate, Curiosity, and Hidden Connections in That Time I Got Reincarnated as a Slime

Understanding Rimuru’s Summoning of the Primordial Black: Fate, Curiosity, and Hidden Connections in That Time I Got Reincarnated as a Slime

Reader’s Question:
Why was Rimuru able to summon the Primordial Black in That Time I Got Reincarnated as a Slime? Did he already know how to summon it, or was it just a coincidence that he summoned the Primordial Black? Can someone explain this in detail?

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