When Heimdall died, the Rainbow Bridge connections between the Nine Kingdoms solidified into a chain. The first link of the chain—in other words, the one closest to outer space—was Asgard, which Hao Ren had chosen as his breakthrough point. Midgard was located at the seventh position in the spatial chain, while the eighth and ninth realms had terrifying reputations that sounded oppressive just to hear about: the land of the dead, Nibelungen, and the underworld, Niflheim.
"In fact, the two other spaces, Nibelungen and Niflheim, can be regarded as one entity." Standing on the fragmented steps of the Rainbow Bridge, Vivian gazed at the pale-purple, polluted sky in the distance and the corrupted, cracked earth beneath her feet. "Even after Heimdall's death and the disruption and rearrangement of the Rainbow Bridge system, these two other spaces will always remain connected. That's because several of Yggdrasil's most important branches diverged within these two spaces. According to the information we have now—this should be the location of the Firstborn's brain core and important nerve ganglia. The Firstborn's immense mental power physically fused these two spaces, causing parts of the continents of Nibelungen and Niflheim to overlap directly across the Space Gate. The border between these two kingdoms contains an area known as the Fog Gate. It's covered in dense fog, and it's precisely where the two kingdoms overlap."
A bright bolt of lightning tore across the sky. Strangely, however, this terrifyingly powerful lightning made no sound. It left a glaring crack across the heavens before finally splitting into hundreds of pale-purple streams of light that plunged toward the horizon. All of Nibelungen was deathly silent, as though even the air here had died.
"This used to be Hela's territory. She was once a powerful necromancer. It's said that the dead would first