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Within the depths of Terra's underground, an enormous, gargantuan entity rested, slowly yet steadily growing large and larger… readying itself to finally emerge out of its shell, the planet's surface, and finally free itself from this enormous sea of miasma that both gave birth to it and that is also imprisoning it.
The entity's mind began to flow with constant information of previous generations, as it was made of their same miasma, it inherited their memories and powers.
Every generation, the entity would become even stronger and deadlier.
But at some turning point in the previous generation, something else got mixed in with the miasma, the will, and soul of a strong Magus, which merged itself with the main Miasma Soul that composed the entity for many generations.