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Ethereal elements are just as ancient as their Natural equivalents, but took a proverbial 'back seat' when the time came to select building blocks for the prehistoric Continent. Here in the Mirror timeline, the Colossal Zarroë has capitalized on the chance to rewrite the rules and give the Ethereal Elements their due. Each Islet is manifested in a separate way; in the case of Shadow Islet, Zarroë began by breaking throuh the membrane but stopped short of punching all the way through to the Mirror timeline. Making a 'pit stop', it allowed dark matter from the Rift, the world between worlds to coalesce upon its hand projection. When enough material had accumulated, the hand was ready to emerge at its final destination near Mirror Cold Island. However, instead of simply transforming into the Islet itself, Zarroë's hand cast a shadow upon the snowstorms below, and the dark matter falling from it condensed into the shifting miasma that we know[sic] recognize as Shadow's domain. Here, Pentumbra's originality is put to the test, as it enthusiastically participates in the Dish-Harmonization process to produce the family of Shadow Elementals and the Cold Primordial, all of which will perform the Islet's captivantingly eerie nocturne!