The moment the cold overwhelmed Alex, he realized that the Yin bead had gained an upper hand on the Yang source that was in his body.
He didn't understand why that was, as both the Yang and Yin sources were both so strong that some little yin from a True realm girl should not have been able to affect it at all.
But it had, and now Alex had to deal with it.
He needed to add some Yang into his body to counteract the Yin that had caused the imbalance. He quickly got away from the girl and realized he needed to get away from this room.
Even with what he had done, this room was still full of weak Yin energy, and that wouldn't be of any help to him at all. Alex quickly walked outside.
The father tried to follow him, to find out what had happened, but Alex was too much in a hurry to say anything. If he let what was happening to continue, he had a feeling that the same thing that happened to his master would happen to him as well.