Final Realm of Mortal Sky!

Ace's eyes widened when he saw the new notification about Page-09! 

"System, you better explain! You just took my freaking shield, and in return, you gave me a notification?!" Ace furiously questioned as he wasn't having it. 

Page-09 wasn't just some ancient script that would render useless once it revealed its secrets, but it was an excellent shield against heavenly punishment that had never disappointed him. Moreover, he just discovered a new way of using it, yet now, the system just took it. 

Furthermore, Ace was under the impression that the system didn't know what page-09 was or wasn't interested in it. But he was dead wrong. Not only does the system know what it was, but it even knows its origin. 

But it was too much of a loss to hand it over without even receiving an explanation.