God-Level Lord of the Underworld in the End of the World

The end is coming, zombies are rampant, species mutate, and Zerg invades. Xiao Chen, who owns the Underworld System, is not afraid. The system can contract and transform with any living body. "This monkey is good. After transformation, he became Mara." "You're not good at this Biaohan. After my transformation, you're only at level one, and you're already stronger than Tyson!" "This speed zombie is still too slow after its transformation. Look at my second transformation. Don't you think this black arm knife is handsome?" The dog transformed by Xiao Chen became the Sun-Eating Tengu. The tiger transformed by Xiao Chen became the Oriental White Tiger. The bird transformed by Xiao Chen became a phoenix bathed in fire. The fish transformed by Xiao Chen became the Kunpeng that covers the sky. The person Xiao Chen transformed has become a human being!