Okay, to be fair to the originial poster . . . I think the real question is where does the fallacy "deus ex machina" begin. When does having god(s) taking part in a story become a problem?
The answer is what everyone has been saying: it has to be set up properly, it can't come out of thin air. I'm inclined to think that in the orinigal poster's story, it could work if he goes over the hill and is ushing towards battle when this thunderstorm comes up (so long as it's established that there is a god and that this god has a reason to intervene then and there--in other words, even a god needs motive). It can be part of an interal dailogue or conflict of some kind instead of "Oh, looks like my enemy's dead. Ah well."
Like everything else, it has to have a LEGITIMATE POINT, which means it isn't just there to wrap up the story as quickly and easily as possible.
The answer is what everyone has been saying: it has to be set up properly, it can't come out of thin air. I'm inclined to think that in the orinigal poster's story, it could work if he goes over the hill and is ushing towards battle when this thunderstorm comes up (so long as it's established that there is a god and that this god has a reason to intervene then and there--in other words, even a god needs motive). It can be part of an interal dailogue or conflict of some kind instead of "Oh, looks like my enemy's dead. Ah well."
Like everything else, it has to have a LEGITIMATE POINT, which means it isn't just there to wrap up the story as quickly and easily as possible.