The Gambler is a divination card. A set of five can be exchanged for a divination card chosen in a weighted random fashion. It is more likely to return a common divination card like Her MaskHer Mask4Sacrifice FragmentTo her beauty you submit, lest your neck the great Queen slit. than a rarer one like The DoctorThe Doctor8Headhunter"They said I needed my head examined, but I'd rather just take yours." - Klopek the Cannibal. The outcome of the exchange can be any divination card including the Gambler itself, and because the Gambler is a fairly common divination card, it is not that improbable to turn in a set of the Gambler only to get a single one back.
The Gambler has restrictions on where or how it can drop.
Can drop from any map area. Has a minimum drop level restriction of 68 Equivalent to T1 maps..
[Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.] This card's drop level requirement was changed.
Drop weightings and minimum area levels for the vast majority of cards have not been changed, but drop weightings for a very small number of cards have been reduced in cases where the number of maps they're available from has greatly increased.
A longstanding bug in the code determining area level restrictions for some divination card drops has been fixed. This means that cards intended to have a high area level requirement (mostly ones that grant item level 100 items) will no longer fluctuate wildly in availability from league to league.