Divine retribution was what would happen when a god decided to directly punish an offender in the mortal realm.
There were two ways a god could go about this. Firstly, he could descend to the mortal plane via an altar. He would usually be summoned to an altar in order to punish an offending follower of his religion. Secondly, a god could mete out his punishment via a messenger. He would simply need to channel his divine power into the body of a willing representative, allowing him or her to carry out their god's vengeance against any of their enemies in the mortal realm.
It was evident that the airship from Ferde had found itself on the receiving end of the second form of divine retribution.
Throughout Ferde's history, there had been more than 15 instances of divine retribution, eight of which had been carried out by a god's messenger.