The 【Decay】 authority of the Wuchang God can bring misfortune to others. Based on the memories of the Wuchang God, it is known that 【Decay】 cannot be used on those with luck above the Red-Luck level; otherwise, it would result in a backlash.
However, 【Punish Evil】 is different. This authority can also bring misfortune, but its core is "evil begets evil." It does not vary based on the depth of one's fortune. The downside is that you must know the specific "evil retribution" to form an evil fruit from that evil cause. Furthermore, the power of "evil retribution" is limited; it cannot perform judgments like the "Eighteen Levels of Hell." A Night-Wandering God can only deliver "minor punishments." Its primary duty is to record evil retributions and report them to a higher-ranking deity.
When combined, the qualitative change is that 【Punish Evil】 can directly break the "defenses" of those with great luck, inflicting misfortune and creating a "minor punishment." During this process, by layering on 【Decay】 to amplify the misfortune, a "minor punishment" turns into a "medium punishment," which is enough to be fatal at a critical moment.
Chapter 268