Time was invincible, that was more or less already established. That did not mean those who wielded time were similarly invincible, for what mattered in their case was not time itself, but to what extent they could display its effects.
Giselle, who had been studying and searching far and wide for anything and everything that could help her reliably destroy Defilers, could use time. But when it came to judge how good her application of it really was, Lex was stunned.
To hide something from his eyes was not an easy task, so although Lex himself was not an expert in time, he could tell what was happening - having lived somewhere around 25 years himself.
