Gacha system mechanics explained
The gacha system has 120 guarantee rate-up with no pity carry-over. Standard 80 pity 50/50 with no guarantee, but pity DOES carry over. Weapon rate-ups have harsh 25% chance (not 75%). After 30 pulls, you get a free 10-pull on the current banner that doesn't count toward pity. Arsenal tickets (for weapons) can be acquired with oroberyl currency. The system is intentionally complex with sunk cost mechanics designed to encourage continued pulling.