Take turns placing cards on the board. Cards have two numbers, attack and health.

Once someone is out of cards, the person with the most kills wins!

When a card is put into play it deals its attack to all 4 neighbors, including your own cards.

If the attack would reduce the neighboring card to 0 health, it is instead returned to its owner's hand. The only way to permanently kill a card is to attack it while it has 1 health.