From the time Adhara left until past midnight, Rex has been cultivating his curse source.
Unlike cultivating mana and reaching a higher realm, the process of binding and fortifying cursed energy into his cursed source is more painful and slower. A snail's speed compared to absorbing mana.
It felt as though he was a builder, breaking his own body, and reconstructing it back.
Most cursed creatures that have a cursed source would be painstakingly slow in becoming stronger, the curse that empowers them dictates that speed heavily, similar to the affinity to an element for an Awakened.
Rex has a very strong curse empowering him, the Eternal Curse.
The Unbinding Cursed Technique that he used to unlock his curse source allows him to completely connect with the Eternal Curse, providing a wide pathway for cursed energy circulation equivalent to eleventh-epiphany and greatly increases the speed of absorbing cursed energy.
