Battle knight

## Description

game introduction:
1\. The game cards are divided into battle cards and skill cards, which can all be upgraded by gold coins. After the upgrade, the card attributes will be increased.
2\. After each game is completed, you can gain experience and gold coins. Experience is used to upgrade the player level. Gold coins can be used to upgrade the card level.
3\. Select 3 cards from the 4 battle cards. If you find that the card attributes of the opponent are greater than the attributes of your card, you can increase your own attributes or reduce the attributes of the other party. When someone whose blood volume is below 0, they lose.