Game description from the publisher:
Darkness envelops the world; chaos reigns. Humanity fights back in the only way they know how -- with forceful control. But how does one control creatures whose existence defies all logic?
Nightfall: Martial Law is a stand-alone game that can be integrated with the hit competitive deck-building game Nightfall. Martial Law brings you a complete new set of cards with special powers, and features all-new vampires, werewolves, hunters and ghouls. Martial Law also introduces the feeding mechanism: Feed your chained orders to give them greater effect!
Each card has a main color and two linking colors. If you can match the main color of a card to one of the linking colors of the previous card, you can chain those cards together. Once a chain is started, players all get an opportunity to link additional cards onto the chain during that turn.
Cards in the chain resolve in reverse order: first in, last out. Instant effects fire off as cards come off the chain, doing damage to your opponents or bringing characters into play to defend you and attack your opponents.
The object of Nightfall is to put wounds into your opponents’ decks and end the game with the least amount of wounds in your deck. But beware: the more wounds a person has, the more enraged they become and the faster their deck works, meaning more cards and bigger chains will come your way!