Grinning Jar

Grinning Jar is a relic that adds a unique colorless card to your deck. When first picked up, it adds 1 copy plus copies equal to your deck size divided by 12, then sets its counter to the remainder. Each time you add a card to your deck, the counter increases. When it reaches 12, you get another copy of the Grinning Jar card, and the counter resets. Removing cards form the deck does not decrease the counter.