Rise of the Slave Emperor - Paused until a better time

Castor lived through a thousand lives. A slave to the will of each world he would reincarnate into. A hero. A demon lord. A sage. A ruffian... All kinds of worlds, all kinds of lives, all kinds of roles that he had to serve. But now, this journey of his is about to conclude. After fulfilling the role of a catalyst to the world's growth nine hundred, ninety-nine times, his thousandth reincarnation comes. The first time when he is free of the will of the world. The first time when he can do whatever he wants. The first time, when he can aim to return to his real home. And the first time, when he is born a slave. "If I want to return, I need to create a portal... A portal that will take an entire planet's worth of resources and manpower to construct." Castor said. "Let's see if I can speedrun the conquest of this world, then!"