My Children’s Gifts Give Me 1000x Returns!

Stripped of his power. Banished to the slums. Forgotten by the world. Eight years ago, Gabriel was a rising prodigy with a noble family, a bright future, and the world at his feet. One beast surge cost him everything—shattering his spirit veins and casting him into the gutter as a crippled outer wall guard while his elite noble wife was dragged away. Now, his twin children face the ruthless Grand Martial College Exam. With no money, bare hands, and bleeding knuckles, they’re forced to fight a rigged system meant to keep commoners down. Gabriel prayed for a miracle to protect them—and the heavens finally answered. Unlocking an ancient system tied directly to his children's growth, Gabriel gains exponential returns for every resource, technique, and weapon he bestows upon them. The city discarded a broken guard. They’re about to meet the most dangerous father in the empire. — Description from novelcodex.org