After five days swept by the zombie horde, survivors finally realized just how powerful the electromagnetic railgun turrets produced by the Changsheng Adventure Group were. These devices are powerful, accurate, fast, and, crucially, have long endurance. Having one is like having several tireless high-level awakeners; they're more effective than any advanced alloy equipment.
Thus, the major adventure alliances began 'collecting money' to purchase electromagnetic railgun turrets. They were determined to trade anything they could get from the Changsheng Adventure Group, even if it meant spending their last catalyst.
After all, "Catalysts can be earned back, but once life is gone, everything ends."
Of course, they didn't know that from then on, there would be no more opportunities to farm for catalysts. Now, spending one catalyst meant one less catalyst remaining. Consequently, over ninety percent of Su City's catalysts ended up in the hands of others.