Not Enough Energy.
Mile was faster than Krune, so they took less than a day to arrive at the entrance of the gate. But because everyone was looking for the super wisp, they were stopped by Divine Soul Realm demon beasts twice. At first, they demanded them to turn back into their original forms. Too bad, though. Mile took out a token of the Mercenary Guild and told them who Krune was.
Divine Soul Realm cultivators and demon beasts have ways to communicate with others outside the danger zone. So after they heard who Krune was, they immediately gave up the idea of finding trouble with him. After all, the chances of any of those two to be the supposed super wisp was just way too small.
After arriving at the right altitude, their vision warped around. A second later, Krune and Mile could see the elemental gate open. Shinja and Yusa were there, keeping the concealing formations activated. When they saw krune and Mile together, they were taken aback.
"Mile!"