Ninja Ninja Ninja features a 54-card deck, with cards numbered 0-5 in three colors, with each card appearing three times. Players have a hand of seven cards, and they play three at a time to create strong card combinations, such as three cards of the same number and color (strongest), three cards in sequence, etc. As they reveal combinations, they can cause damage to one another based on the strength of their attacks and defenses.

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