。
I will become the god of the new world.
Literal
I [topic-は] new-world [genitive-の] god [into-と] become.
A dramatic character declaration — famously the line delivered by Light Yagami (夜神月) in the manga/anime Death Note, announcing his intent to reshape humanity. 僕 ('I') is a softer masculine first-person than 俺, typical of intelligent-young-man characters. 新世界 ('new world') and 神 ('god') form an iconic pair for this kind of ambition. ~となる (the formal/written variant of ~になる) is more elevated and dramatic, fitting the declamatory register. The whole sentence is minimal but loaded — every word carries weight in this hubristic proclamation.