This is an additional type of Challenge Card that was developed to try and capture the feel of someone who fights a battle they know they will lose, just to take as many of the enemy with them as possible.
If a Defending player plays a Defend Card and the Offensive player plays a Compromise, the attacking player loses, but does not gain consolation.
If a Defending player plays a Defend Card and the Offensive player plays a War card, each attacking player must lose a number of tokens equal to the difference between the number of their tokens and the number of defending main player's tokens.
Example: In the same example above, Blue reveals a War card. The difference in the number of tokens between his and Red is 1. He loses 1 token, and the other 1 may land. Yellow must also lose 1 token, and 3 may land (the difference is still only 1, even though Yellow had more tokens than Red, and Blue has fewer tokens). If Red were only defending with 1 token, then Blue would still only lose 1 token, but Yellow would then lose 3 tokens.
Even though a Defend Card is a Challenge Card, if an offensive player has no other Challenge Cards in his hand, he is considered to be out of Challenge Cards.
Defensive allies do not alter the affects of a Defend card in any way.
Expansion by Jack Reda