Su Chengyu's words were decisive and serious; he was well aware that to smoothly exit the Tower of Eternal Winter, he must win over the Tower Keeper standing before him.
As someone assigned by the Bei Luo Empire to suppress the Nether Clan in the Tower of Eternal Winter, even though he wasn't an Earth Immortal, he surely possessed means to contend against one within the tower.
With the Tower Keeper's help, coupled with the mother of You Ming, the two could possibly have a chance of survival.
Regarding the relationship between You Ming and the Demon Slayer Department, Su Chengyu did not pay too much attention; since the Demon Slayer Department dared to have them attempt to release You Ming's mother here, they must have a method to constrain the other party.
If it was merely using You Ming to threaten and exploit the other side, Su Chengyu would even less mind sending such a huge trouble Yang Chengyin's way.
