From Monster Paradise Wiki
Monsters are captured in cards and then released later. The various parts of the card tells you important information about the monster captured within. The following list explains the many parts of the card:
1. Border and Stars – The border and number of stars on a card indicate it's overall rarity. Rarer cards have more stars.
2. Race – The race of the monster is located on the bottom right corner. There are many different races of monster.
3. Monster Element – The element of the monster is displayed in the upper left corner. Monsters can be Fire, Water, or Wind type.