Lex could feel the control of his body lower as the Originator Eye Demon gained some control and awoke from his slumber.
[The stronger this body is, the stronger it will be when I manage to take it over] thought the Eye Demon to himself as he planned to help Lex out this once.
He was also afraid that his host would lose against the demonic cultivation master and have to restart his cycle all over again, so wanted to help strengthen him slightly.
His host had finally developed and adjusted to the system and to find another suitable host, then wait for them to develop, would drive the Eye Demon insane, as he planned to help Lex get past his current hurdle for their mutual benefit.
While he was also looking forwards for any evil or demonic items and or treasures that the demonic cultivation master might be in possession of, which he could take for himself while Lex inevitably used the Third Eye in battle against him.