The effect of Fortune Flatbread depended on fortune. To put it bluntly, it depended on one's luck.
Bu Fang's use of the Divine flame to roast them did not fundamentally change them, but the power of over a thousand Laws contained in it had washed them and given them extraordinary power.
Lord Dog's three heads each bit off a piece of Fortune Flatbread. He didn't chew but just swallowed them. A steady of fortune energy immediately poured out of them and went into his body. The next moment, the Earth Prison Flames all over him grew more raging and hotter and seemed to blot out the sun. It was terrible.
In the sky, Heaven King Tai Hang sneered. He didn't care at all about the black dog's actions. Eating flatbread? What good could flatbread do? Could they make this dog into a heaven-defying being, not to mention that they were cooked by a chef who was merely a Demigod?