Wang Wei was wrong; Ji Xinghe didn't actually need Dongguo Cilian's energy, if it was just about facing a thousand by himself.
But he wasn't entirely wrong, as Ji Xinghe indeed needed Dongguo Cilian's energy.
It was not to use it as a cover for exposing his own ability to harness such power later; Ji Xinghe no longer needed that kind of protection.
He was very clear about it; as soon as he mastered the granted power, he would reveal it publicly.
Even if, by then, he was the only person in the entire federation who had mastered the granted power, he would disclose it without hesitation.
For victory, for the protection of the federation, and for the destruction of the empire, he had no reason to conceal it.
Star Moon's concerns wouldn't materialize because Ji Rongxinyue was right; the federation would not fail those who protected it, and the errors of a very few could be resolved.