Full-Time Survival: Necromancer, I Am a Natural Disaster

[Single heroine + witch + disaster + survival + undead + no system] Everyone around the world travels to an unknown world, starting with only a small wooden house. This world contains towering beasts and endless disasters. The world is full of opportunities and... Careers. Everyone can choose one of three starting careers. Farmers, lumberjacks, archers, maids, succubi, fishermen... Wang Feng chose the Necromancer to summon the undead and the undead will exist permanently. The one-star skeleton rat went to eat the tree Two-star skeletons go farming … The seven-star two-winged black angel, the eight-star death bone dragon, and the twelve-star... However, only one undead can be summoned every day, and low-star undead have average combat effectiveness. Until he meets a witch and something outrageous happens. Strengthen the undead, upgrade the undead, transform the undead, fuse the undead, speed up the summoning... … What a disaster? I am the real natural disaster!