Territory is one that must be in defense or to be grabbed, that's what happens in real life. the mountain monster who first occupied the place would not give up its territory to those who wanted to seize it, when the sea monster came to take possession of the place, with a burning body he made a resistance to maintain his power between life and death. An extraordinary battle going on around it, the monters did not even allow the ruler of the sea to approach his place of power.
This is a short story from me, thank @xpilar