Lex took a moment to inspect himself. His sudden control over the Dao part of his Dao body originated from his control over laws, based on what he had learned from Regix. In that sense, Lex could control it by sealing or unsealing his tenet. However, as long as the tenet was unsealed, the Dao body seemed to resonate on its own with his newly acquired understanding of laws, thereby creating a weak yet definite effect following whatever his intent was.
While on the surface this seemed like a good thing, without being able to control the effects of his Dao body, Lex was actually playing not with fire, but with a nuke. In theory, there definitely was a certain safe distance at which he could toast a piece of bread using a nuclear explosion, but in practicality he was more likely to eradicate the bread itself than to perfectly give it a light brown toast.
