Now that the curse had been dealt with and the ancient methods, an alternative to the classic method of cultivation in the Spiritual World, were with him, Minos had nothing left to deal with that old man.
Even though the curse had caused him a lot of trouble back then and had almost killed him, he wasn't Minos' concern now. Besides being limited to a small area, such a being could not be compared to the 32 Gods of the Mechanic Empire.
Minos wanted to 'dance' with this old acquaintance to test his current powers. But since this being had given him everything he wanted without much difficulty, there was no need for him to fight.
This journey, which Minos had started by leaving Dry City earlier, was to test his powers but also to settle old matters and some new partnerships. So, not fighting was not necessarily a sign that his goals had failed.