Transmigrate Across the Globe and Conquer Another World

All life-forms on the planet are captured and taken to a small world. This world is a training ground created by the captors to train the creatures of Blue Star. The captors spare no effort to increase Blue Star's strength, all to achieve their own ends. The most important thing for the captured life-forms of Blue Star is to stay alive... The male lead becomes invincible later on, but he will have opponents. They can fight him, but they won't be stronger than he is. There are several female leads, but in my setup, the male lead won't fall so deeply in love with anyone that he can't let go. This is a male-oriented novel, so I won't pass up any girls with a good setup. Since the whole world transmigrates, the story will lay the groundwork for the natives of Blue Star to grow stronger and develop an awareness of cultivation. The buildup may be a little long. They're all from Blue Star, so I find it a bit unbelievable that they could just transmigrate and immediately thrive in another world. There are two main settings: one where Blue Star can grow stronger and develop that awareness, and another where the whole world wages war. Everyone has different ideas, which is why fanfiction exists. I've been reading for ten or twenty years, but I've never written anything, so just enjoy it for fun.