4 Dimensions: Lylark | Union of Umbra and Aurora

The 4 dimensions or so-called elements of astrology(zodiac sign). Consisting of fire, water, earth, and air elements. Each with 3 zodiacs in account:
Fire: Saggitarius, Leo, Aries
Water: Pisces, Cancer, Scorpio
Earth: Taurus, Capricorn, Virgo
Air: Gemini, Libra, Aquarius

All with 12 different signs belt around the heavens extending 9° on either side of the ecliptic the plane of Earth's orbit and of the Sun's apparent annual path. Hence, the 12 divisions.

Lylark- A self-made noun enough to name the vast universe which came from the conjunction of words of ly and lark
Ly-(forming adjectives(-ly)) having the qualities of.
Lark- something done for a joyous adventure, something daring; an amusing escapade.

A story having the quality of a joyous adventure that dares to ride the escapade circumscribing the vast cosmos.

A chronicle of how both umbra(darkness) and
aurora(dawn or lightness) came into existence, how it separates, how it inches away from each other, and how it unifies.

An umbrella yarn of events of the escapade of Astelene to bring out into the open the secrets of the untold.