Funny thing, ThunderLad, I had never even heard of Dwarka until the day you posted this. I was watching a series of documentaries about ancient aliens on Netflix "watch instantly." In an episode about underwater cities, they talked about Dwarka. According to legend, at one point Ajuna attacked the city by hurling down lightning bolts from his flying chariot. Krishna responded by shooting back giant arrows that launched with a might roar and glistened like sun beams. To the ancient astronaut theorists, this seemed to indicate (obviously) that the two gods were warring members of an extraterrestrial race. Ajuna used energy weapons while flying by in his space ship, and Krishna responded by firing back some kinds of missile.
Don't know if any of this would help your story, but it struck me as something that might fit neatly into a comic or pulp adventure!