"Vauleth" doesn't have many early memories.
He only recalls living in a haze, drifting in the wind. Sometimes it felt as though he'd become an extremely small ant and live its life serving its queen.
Then there were the many years he'd spent in a daze as a towering tree.
Unfortunately, none of his 'past lives' had been as particularly intelligent or powerful creatures, and so he barely had any consciousness or self-awareness.
That is until one day as a dying (the memories were hazy…) mayfly (?) his weakening body landed on a cool round and white object. It was an egg composed of what looked like white scales.
Until then, all of the creatures that Vauleth had become were ordinary animals or plants. Since he needed to consume and take the genes of the creature he infects into himself to form his own body based on these genes, he wouldn't be able to overpower a dragon to do so—even a defective unborn one.