Ultraman: The Monster Legion Begins with Saigogu

[Villain Protagonist. His true form is the Yanma Monster Saikoguru, and he can take human form. Readers who dislike villain stories should beware.]

[Not purely evil; he has his own principles. Monster-faction story.]

"Transmigrate into the Zeta universe? Become the legendary Yanma Monster Saikoguru from the start? Devour monsters to extract their genes and create an army of Yanma Beasts?"

Feeling the ancient power surging within him, Lei Hao's eyes glimmered. "That means I can slowly build up my monster army."

The various factions across the universe asked, "What can you actually do? Is charging in all at once with monsters really a strategy?"

"Strategy? Come on, can't you understand players like me who focus on cultivation? If you can't beat them, just check whether my Yanma Beasts have devoured enough genes and evolved properly!"