My Sister Died Tragically, and the Banner of Awakening Souls Transformed into a Natural Disaster!

[Hot-blooded + cool writing + not the Holy Mother + invincible crushing] Xu Yuan traveled through the world ruled by the Immortal Cultivation Sect and lived with his sister. On my sister's eighteenth birthday, what greeted her was the corpse of her that had been tortured to death! The extreme pain and grief impacted his mind, and the Ten Thousand Soul Flags completely awakened! I, Xu Yuan, am willing to turn this body into a natural disaster! For my sister, fight against this world! The aloof and powerful young man was still mocking wantonly. Little did they know, what they had to face was not incompetent and furious ants. But a madman who lost his only close relative and killed demons and immortals! All living beings are suffering! I help all sentient beings to cross! Come on!