"Yes, I can give it to you, but it's not on me, you can even check my storage ring, as long as you can get me out of this place, I can hand it to you once we reached my 'abode'!" Ace quickly reacted.
He knew this was his only chance to get out of here before that Demon Duke arrive. He did not know how would that Duke behave, but a person with a Demon Duke title won't be fooled like this low-rank subordinate.
Furthermore, he was basically asking Shadow to betray Duke Livy and come to his side with just a mere empty promise, so he had to win over her trust, which was probably night impossible.
But he had to try so, Ace quickly removed his Qi mark from the storage ring in Shadow's hand, he had to convince her and if this refinement technique was really important to her, she would probably believe him after examining his storage ring which was just a dummy to fool others.