The Honkai Impact 3rd character gacha system starting with Cipher

One second, he was a helpless idiot, always getting the guaranteed bonus. The next second, he got seven cats in a ten-draw draw! In that moment of ecstasy, he was—happy! (In a physical sense) Then, in this world where superpowers and technology are heavily shackled, many legendary figures appeared. Cipher The nightmare hanging high above all bounties, the very name that strikes fear into the hearts of the wealthy in the Cloud District. If a coin with a sinister grin and cat ears appears quietly beside you... Congratulations! At this moment, your wealth, cutting-edge protection, supernatural guardianship, and the astronomical figures shining in your account have all turned into a cold number, "0", after her silent visit. This is the worst nightmare of wealth. Sam The living legend of the Mercenary Association, whose true appearance remains a mystery. When the iconic silver-white armor appears, it heralds an efficient end. When he accepted the commission, the blazing light became an invitation to death - no matter how difficult or dangerous the task was, it would all turn to dust in the trace of light that burned everything. Wind Sumire A pink-haired girl with twin ponytails and an unknown color beast, her whereabouts are mysterious. She is a miracle lingering on the brink of death, and her medical skills are coveted by the most advanced "Creation Technology". If you can meet her when you are on the verge of death, it would be a blessing that death has failed to fulfill its promise. But do not attempt to meddle with this power— Those who had extended their greedy or violent hands towards her had long since turned into silent dust... a warning to future generations.