"This… this can't be!" Nino said as she watched the distant Dimensional Rifts, her whole body shaking with horror. "We… had time… I was sure of it!"
Just like how the Aether from the human Souls served as bait to draw the Nephilim world's Primordial in, the Key itself became a beacon. The high concentration of the fifth element removed the need for the Ritual, an unintended consequence of creating such high grade Artifact which leads to its presence being detected by ancient entities from other plains and dimensions.
The barrier halting inter-dimensional travel was one of the solutions meant to prevent the worst case scenario. Even with it removed as soon as the Ritual ended, a few hours should've passed before the first Dimensional Rift appeared giving the Valkyries and Nephilim enough time to isolate the Key and escape to the other world, but once again Fate has decided to change its course throwing the plans of those who dared to peek at its Tapestry into complete chaos.
