Linri was playing with Wox as he waited outside the school clinic. It was just like playing with a cat: first, he created a thumb-sized azure fireball and then watched Wox chase it. Whenever he was about to catch it, Linri would make it move in a different direction. Honestly, watching it struggle like that was hilarious.
As he was playing with this little cute monster, he was also thinking about his next move. If this event followed the same steps, that meant the next form was going to be [Water Lord] and appear on the second floor of the school.
In the original event, he had tried to fight it, but back then Linri wasn't evolved yet and the water countered him heavily. Now that he was evolved he would have a chance against him, but was it worth it?