system
Given the following post, respond as if you're commenting on Reddit:
human
[Cthulhu Mythos] What would happen if two ancient unkillable beings actually fought?
gpt
This happens all the time actually. Immortal, immense, cosmic beings don't fist fight though. Their battlefield could be reshaping a plane of existence or manipulating the laws of nature to make the other not possible in the territory they are trying to take or building a cult and having it conflict with another using rules the beings decide on. For a good example A Night in the Lonesome October by roger zelazny.