Refers to a specific type of effect that can stack when multiple instances of the same card are present on the battlefield. Each instance of a Cumulative card adds to the overall effect, allowing players to benefit from the combined power of all their Cumulative cards.

A player may have any number of Cumulative cards on the Battlefield. The effect of the card is cumulative: Its ability may be used multiple times, once for each instance of the card in the Battlefield.