Thousands of Races Compete for Hegemony, and Get the Portal System at the Beginning

Zheng Yan was forced to join a game where thousands of races competed for hegemony, but encountered double troubles at the beginning: plague and invasion. Fortunately, the system activated at the critical moment turned out to be the portal system. In this case, it makes sense for me to lead my soldiers into the portal together, right? In the first world, the zombie world, when the ace master full of chilling aura comes here, the zombies know that their doom is coming. In the second world of magic, it's time to let these cowardly magicians know the power of sword and fire. The third world...