The title [gambling gambler] was obtained by snow when he was level 50. The reason why he used it until now was that the title's attached ability [evil luck] was a law of causality.
This ability allowed the user to change the probability of certain events in front of them, turning some extremely low probability events into 100% reality.
A simple example would be roulette.
There was a saying that in roulette, it was impossible to get the same number twice in a row.
This statement was naturally not accurate. In roulette, it was not "impossible" to get the same number twice in a row, but "almost impossible" to get the same number twice in a row.
Other than human factors such as cheating, the probability of that actually existed. Perhaps it would appear once in a thousand turns, or perhaps it would appear ten thousand times, or even a hundred thousand times.
No matter what the actual probability was, if he used [great luck of evil]... He could do it twice.