In the Infinite Doomsday, My Stamp-Collecting Beauty Lights up the Technology Tree

[Unlimited copy flow, team development, multiple female protagonists, decisive killing, not brainless] Yang Xiaonian entered the Doomsday Survival dungeon on the day of college registration and successfully bound to the "stamp collection" system. For every 90-point "stamp" he successfully collects, he can receive different types of "specialization" feedback. Each new round of "Doomsday Dungeon" opens, like a natural breeding ground for the dark side of human nature, facing the pressure of life and death. But Yang Xiaonian was actually... [Detected contact with stamps, unlocks the channel to obtain doomsday coins. [An increase in the contact area is detected. Basic Specialization Lv1 provides an additional 10% output. It is expected that you will receive 11 Doomsday Coins in one hour.