Baiyi was not sure what the War God's words implied. One possibility was that his initial theory may have been wrong, so the War God humored him with a prophecy-like statement before leaving him to solve the mystery. Another possibility was that he had been right, and the War God's words could be seen as a backhanded way of affirming his theory, implying that he wastes no time in trying to solve the mystery.
After thinking about it for a while, Baiyi leaned towards the second possibility, purely because of the War God's parting words —"Be ready". That was an ominous warning that the War God would not have uttered if he was being perfunctory.
'Be ready for what? Be ready with what? Why do gods never give straight answers? Do they just delight in giving vague replies?'