A being with unmatched potential but a lack of creativity, that was Brangara. However, what made him scary was the fact that whenever he was engaged in a battle, he tapped into that potential. The more he fought, the more hard-pressed he was, the greater he explored his potential.
And that unfortunate reality was why one couldn't fight him without being fully prepared to kill him. It was why the Mystic Seven harnessed every ounce of their capability to kill the Celestial Boar during the Third Major Disaster, for they knew for a fact that they wouldn't win if they were to delay any longer.
But even though Brangara had unmatched potential in terms of strength, his schemes could be predicted to a certain extent. Once Yarsha Zahara was dealt with, only his power was a concern.