Xasha and the others were moving at full speed towards the source of the spike in Imperium. The source was a tower far north, as Xasha got closer, he noticed the temperature steadily dropping off.
Eventually, the cold became so intense he could feel it pricking his skin, like needles. He didn't slow down or retreat, instead he shielded the others with Imperium and pressed on. He made it to the tower and entered from the balcony. The cold inside the tower was mind-blowing.
Xasha felt his body going numb and his fingers turning blue. The elevators had frozen over, so he took the stairs and made it to the highest cultivation room in the tower. There he saw red liquid whizzing crazily around the room in a massive, Imperium-filled vortex.