The dual Small Worlds, since their creation, had been two separate spaces coexisting but, once contracted by a cultivator, they would no longer maintain contact.
As Yuezheng Yan successfully contracted Kagawa Mizuki on his side, the Water Crystal Mirror that originally stood at the intersection of the two Small Worlds split into two, transforming into palm-sized Water Crystal Mirrors that fell into both of their hands.
As soon as a Small World was contracted, it would automatically merge into the cultivator's body. A bright vortex of light spun towards them and, when they reappeared, they were at the side of the huge lakebed boulder where Lu Xingyan had used the Formation to enter.
Yuezheng Yan not being of the Water Spirit Root and only at the first stage of Qi Refining naturally had no ability to avoid water underwater.
Lu Xingyan stuffed a Water Spiritual Bead into his chest and wrapped him in a Bubble, then grabbed the collar of his shirt and swam upwards with him in tow.