System：Conquering Isekai World With The Cellphone

*As the high school student he accidently got the magical pehon which could help him walk on the path of being immortality!
In order to obtain the core material, "Black Dragon King's Blood", He took the phone and traveled to a Isekai world.
Because he could use the phone to modify his body's genes, he had the ability to replicate magic. 
At his trip where he began searching for the Black Dragon King, No enemy could stop his step.
By slaughtering the Evil Dragon, absorb the God of Swords, learn the God of Law and the God of Magic.
Let us see how could this young man conquer this Isekai world!