Each player receives a hand of cards. The goal is to recruit clans with the most powerful ninjas. On your turn, you take 3 actions:
Recruit (draw one ninja from the pile and add it to your hand) or be corrupt (flip over the top card from the draw pile, add as many cards as its value +2 from the draw pile to your hand, then add the corrupted card to your Corruption pile)
Place cards (optional) face up in front of you to start a new clan or to reinforce an existing one. You start a new clan by playing 2 to 4 cards of the same color. Playing 2 triggers the clan’s effect, while playing 3 or 4 triggers a more powerful version of the same effect. To reinforce a clan, add 1 to 3 new ninjas of the same color, or a powerful Yokai (wildcard). There can never be more than 4 ninjas and Yokai in the same clan.
Discard a card from your hand.
The game ends immediately when a player places their fourth clan.
Each players scores the sum of their ninjas’ strength, minus the total sum of the values of the cards in their Corruption pile. The player with the most points wins.