Worst Summoning System

[This book has unlimited single-player streaming, and will eventually summon the strongest men from all over the world to come and fight against the dark race] There are currently 6 worlds, and it is expected that there will be 6 more worlds to write. The following introduction is useless: Since the establishment of the system, Chen Baijing feels that he has never returned to the road of becoming stronger. Passively becomes stronger. System: "I am doing this for your own good." Is the dog system taking advantage of me? Chen Baijing: "Then I still want to thank you?" The system smiled shyly and handed over a bunch of death missions: "You're welcome, that's right."