Gambler

Location of Gamblers :

 * Trier: Clan warehouse next door (where the Knights)
 * Gordon: Clan warehouse nwarehouse ext door (where the Knights)
 * Antica: Entrance general store

What is Lucky Coins ?
Lucky coins use to play with the Gamblers

Where can i get Lucky Coins ?
Lucky Boxes

Gambling
You need to guess what in the back of the 1st card

you can from the 3 card below of the 1st card

If you are lucky and guess the right card

Blue, Silver, and Gold Cards
Source : Lucent Heart Japan