Listing your ideas in order to generate a topic for your writing is called Brainstorming.
I would say
"He had never been the adventure-seeking type, after all."
Answer:
The left handed twin created things that were contrary and bad in relation to the things created by his brother, while the grandmother favored the left handed twin in all battles with the brother.
Explanation:
The right handed twin created good things that generated benefits for human beings, being he the creator of human beings, but the left handed twin always spoiled his brother's creations, creating contrary things that disfavored the human being. The action of the two twins left the world in balance, but the right handed twin saw it as a disobedience of his brother and ended up killing in a conflict generated between the two.
The grandmother of the two was disgusted with the situation and called the right handed brother a murderer. He thought that his grandmother favored his brother, cut off her head and threw it into the sky, raised the moon and threw the body into the sea, creating the fish.
