The dimensional barrier of the Nine Realms was incredibly sturdy. The Nine Realms themselves relied on the World Tree, and the World Tree was a priceless treasure born at the dawn of the universe, a part of the universe's origin. It was far too difficult to shake it.
Even the Three Great Empires found it difficult to break through. Most of the time, they would tamper with dimensional entrances—either blasting a crack into one or fooling its identification system. In any case, they did it covertly. No one would be foolish enough to bomb the wall itself. For one thing, it could not be blown open; for another, even if it was, it would seal itself almost instantly. It could not sustain passage and would be a complete waste of resources.
But this time, the dimensional barrier of the Nine Realms had been blown open directly. The burst of power had lasted too briefly for Odin to see what it was. He could only wave a hand, summoning two ravens before him.
He waved toward the front again, and the ravens flew away, clearly heading to the site of the incident to investigate for him.
Within the Nine Realms, ravens were Odin's eyes and extensions of his will. There was nothing they could not help Odin learn—but this time was different.
Loki waited anxiously for news. If the situation outside had not been so dangerous, neither his father nor his brother would have stopped him from going out, and he would have gone to investigate himself. Still, it was fortunate he had not gone this time. Otherwise, the trouble would have been enormous.
Odin suddenly groaned. Loki saw blood streaming from his eye socket. Odin staggered back several steps and said hoarsely, "Spring water... World Tree..."
Loki swiftly flew to