The first time Kyran met Caelan in his sea of consciousness, he was on the verge of death because both his Draconic and Void magic cores were on the rampage. Their rampage caused his central core to suffer, and if not contained, he would explode and die— or die and then explode.
During their conversation, Caelan repeatedly hinted that their meeting had been far too early, which prompted Kyran to think that the trigger of their meeting was not his rampaging magic cores but something else.
Caelan confirmed this the first time they met. It was when Kyran asked if he would see him again in his sea of consciousness if one of his magic cores went on a rampage again. Caelan answered that Kyran would be sent to his sea of consciousness, but he, Caelan, would not be there.