Licht simply stayed quiet, there was nothing he could do now, even if he wanted to fight and cause mayhem, there were currently 4 first evolution combatants in the room together with him, not to mention the king who was stronger than any of them and could fight against 2 to a draw. The only thing he could do now was simply waiting for the verdict and let the king and the higher-ups of Riplas decide his fate.
If he needed to die in order for his people to survive then so be it, he was already prepared to die after losing the fight against Reign and Lisea after all. Of course, it wasn't as if he wanted to die, if there was a possibility that he could live then he would gladly take it, of course, if it was under some kind of slave contract then he would decline, he was a king after all and would rather die than live so shamefully.
