The Peak of Mortal Sky

After hearing the system's revelation, Ace remained rotted in his place for a long time in a trace. It was impossible for him to believe what he just heard, but it was coming out of the system, so it was impossible to be a lie. 

"I-is it really true?" Ace asked after snapping out of his stupor. 

"[System never lies.]"

Ace inhaled sharply after System confirmed it as mirth bloomed in his thievish eyes and mulled, 'I need to calm down, or this revelation is nothing to me. I first need to enter the Moon Domain by going past that orb guardian. My first target is the Moon Secret Realm!' 

Ace looked at the sleeping orb guardian and then the gate that led within the Moon Domain. 

'Although I will lose my trump card for some time after this, it's worth it as long as I can pass through that guardian!'