Thunderfang
Thunderfang the Shatter Dragon of Chaos (formerly known as the Arc Dragon of Chaos [ 7 ] ) was the former highest Arc Dragon [ 2 ] in the First Land after the Firstbourne , as well as a former general of the Dragon army who possessed the power of Chaos , being the source of the powers used by the Forbidden Five . Thunderfang wielded the extraordinary capability to conjure storms that unleash devastation, drawing upon the chaotic powers fueled from the souls of Oni he absorbed . Motivated by his numerous victories in the war against the Oni, he aspired to join the Source Dragons and become the Source Dragon of Chaos . [ 8 ] However, he was deemed unworthy, prompting him to seek retribution. He was ultimately defeated by the Arc Dragon of Focus in the City of Temples , resulting in his imprisonment beneath the Storm Mountain of the First Land. He then chose the Forbidden Five to receive his corrupted energy. . After the Forbidden Five returned, they aimed to find the Prismatic Blades and free Thunderfang to get more power from him in exchange. However, upon his release, Thunderfang betrayed them by devouring their souls and battled the ninja as he set out to exact vengeance against the Merged Lands once more. Ultimately, the Shatter Dragon met his demise at the hands of Arin , who used an healing elixir sourced from the Well of the Lost that allowed all the souls he had consumed