Isekai Dominating System : Start As A Snake

*As a modern citizen he found it hard to accept that he had been reborn as a snake after being poisoned to death in his previous life. 
Why？！ Even if he was turned into a woman is better than this, at least he was a human! 
"Ding! Host is in a state of hunger. When the satiation is zero, host will die. Host, please eat as soon as possible!"
" Ding! Discovered an egg of an Emerald Bird in front! ' Please consume it as soon as possible..." 
Is this some kind of joke? Nobody willing to live like this, Right? ….
"Ding! Congratulations to host for devouring three secondary life forms. Received evolution chance + 1! Please choose the direction of evolution"
 "Ding! Congratulations to host for devouring three secondary life forms. "
"Received evolution chance + 1! Please choose the direction of evolution:
 1: Poison Fang evolution, toxicity + 1 
2: Body Evolution, Strangulation + 1 
3: Scale Upgrade Defense + 1 
4: Abdominal evolution, Movement Speed + 1 
5: Sensory Evolution, Agility + 1 
6: Exchange for skin, can change the color of the body. Host's current color is red! " 
Ok, I take my word back… 
Now in this mythical cultivation World, what kind of Adventures he will have？ 
With system’s help, Let us see how this little sneak trun this world up side down！