Nuwa had already warned him not to trust anyone, including Eclipse. Although he certainly liked Eclipse's attitude, and she had done nothing to make him suspect her even in the slightest, the immense disparity between them made it so that Lex needed to be cautious regardless of the situation.
The same was true for all the other Dao Lords. If he wanted to fish for information, he subsequently needed to offer something in return. While he would do his best to gather information slowly without having to pay for it, he needed to prepare just in case he had to pay.
His mind went towards the Heavens puppet. He had an active quest which could turn the Heavens Puppet into a one-time use weapon, or reveal a forbidden secret about Arch-Heaven, or reveal a forgotten history about the Primordial Age.
