Business card is found in the Elona+ mod of Elona. Using it on yourself or a pet will allow you to change the name of the character's class. Changing to a pre-existing class will change your or your pet's class feat correspondingly. Entering a custom class will keep your existing class feat. It is consumed after use.
Note: You have to write the class in lowercase letters, otherwise you will not get the feat. (ie "warmage". not "Warmage")
They can be obtained by winning a certain amount of blackjack hands in a row (6?), depending on the bet, and are also very rarely found in dungeons.
Customization[]
The item sprite ID for the business card is 383 (Row 11, Column 20) using the item sprite zero-based position system.