"Hey. Let's make a deal. I will set you free from your seal, in exchange that you grant me the power to wield the sword."
The chained winged demon glanced at Sato in surprise before bursting out in a fit.
"Haha. You, a measly ant that I could easily squash at my prime, dare to think you can strike a deal with me? Don't make me laugh." The demon ridiculed Sato.
In its opinion, Sato bringing up the idea of a deal made it seem like the two parties were of equal strength. Usually, one would only perform deals with someone of similar stature or strength with them. As Sato was nowhere near it in comparison, the demon felt it beneath it to make a deal with Sato.
One should know that the previous 'deal' of setting it free in exchange for magnificent power was a lie. The fiend never planned on making a deal with Sato as it felt that was beneath it. Even now that Sato presented this idea to the table, it was disinclined to bargain with Sato.