The Devouring Dragon's Revenge

The West Gourd clan falls into crisis after their grandfather is tricked into a contract of a hundred billion Spirit Stones. His six sisters are mortgaged to a snake demon, and youngest brother, Ye Qi, is sold off. The sisters send Ye Qi away to save them. Ye Qi awakens the Myriad Things Devouring System. By devouring Demonic Beasts, his level skyrockets to SSS-rank. Ye Qi vows to devour all demons, raze the Entertainment City, and buy back his sisters.