The tree of life

Now everyone knows that the mad mind is back. It is looking for Clay, for unknown reasons.
While running away from the humans, Clay and the seeker was attacked by the mad mind. They couldn't see it but the sound wave in the air was the sign of the mad mind.
The seeker decided that the earth is not safe anymore. They ran into the tree of life, which extends out onto the universe, and of course, it is huge.
For further safty, they moved into an enormous living creature called Leviathan. Inside this animal is like a small world. Many smaller creatures live and they altogether form a life pyramid.
Few days passed and Clay became very lonely. She wanted to meet just any kind of human form.
In the dark side of Leviathan, she saw a human-looking figure running pass her.

Wow. This sure is in the future. Later, Clay would know that all the creatures like the living tree or Leviathan came from the experiments of us humans. I wonder what kind of experiments were going on...