Noah died but his will remained.
It wasn't a conscious will, only a sliver of the strong emotion that he had felt when he died.
His body was left on the ground to feed other worms, Noah felt as if his conscience was spread among other beings.
The hunger returned.
It was an instinct too strong to suppress, Noah had to eat or he would go crazy!
Yet, that place didn't have that much "Breath" to begin with, only the terrain offered some kind of nourishment.
Noah ate the terrain without hesitation, his mind was divided between ten or so worms but his experiences were the same.
All he did for years was excavating and eating terrain, without ever managing to satisfy his hunger.
Then, that feeling became even stronger.
Noah couldn't control himself, he went looking for his companions.
When he found another magical beast, he pounced at it without hesitation!
He fought, using his body to perform simple attacks.