He made brag of his skill.
To brag of the good you have done will never impress anyone.
Mr. White brag of his late father who establish the firm.
No city in an authoritarian state could guide the world, even if its leaders brag of rising wealth and high-speed trains that run on time.
He made a great brag of his ability.
Cunning egotism: if I cannot brag of knowing something, then I brag of not knowing IT; at any rate, brag.