Originally, Tie Dan was taking the fall for the nine major sects this time. Moreover, as the Sect Leader's Direct Disciple, four against one and still losing—the leader of Xieluo Mountain naturally didn't want to lose face, so he casually sent a Golden Core Disciple to deliver payment and retrieve people. He just sent a sack to exchange the four clueless fools who learned their lesson.
Indeed, Tie Dan released the captives with just one sack, because this was specially made by the ancestor! A Nascent Soul Treasure! Sumeru Mustard Seed, vast space! It can hold anything and even conceal Heavenly Mechanism! Of course, the subtext being that they should take what they stole and leave quickly...
Tie Dan was happy, as expected, when you save face for the ancestor, the ancestor saves face for you. Furthermore, he's never obtained a real spatial magic treasure in all his cultivation years until now!
