This card's artwork is similar to the artwork of "Jewels of the Valiant", which depicts a battle of the heroes of LIGHT and DARK against a god-like villain ("Sophia" and "Tierra"). In the artwork of the "Jewels of the Valiant", the heroes are separate individuals of the LIGHT and DARK sides ("Constellar Sombre" and "Evilswarm Kerykeion", respectively), whereas in this card's artwork, the hero is a single figure that appears to be created from LIGHT and DARK sides ("tellarknight" and "Shaddoll", respectively).
The events in this card's artwork after those of "Void Feast".
Purusha is a Sanscrit word with many meanings, most significantly being the name of the entity that became the origin of all things in Hindu mythology, described as a giant with 1000 heads, 1000 eyes and 1000 legs.
Aion is a Greek word meaning "time, age, era" and a word Plato used to use meaning "eternity". It refers to the true god's metaexistence in Gnosticism and its an existence that opposes to the Archon (which is the fake gods, such as "Sophia").
The kanji meaning of the name translates as "The eigou kaiki towards the soul origin". Eigou kaiki usually means eternal reocurrence but this one is a pun were the replace the "eternity" kanji for the "shadow" kanji. Eternal recurrence is the concept proposed by Friedrich Nietzsche in Thus Spoke Zarathustra and it says humanity has no previous lives or next lives, but repetitions of the current life.