(This card comes into play with 0 counters on it.)
Once during either players turn, that player may discard a card from their hand and put a counter on this card. Then, they reveal the top cards of their deck equal to the number of counters on this card. That player may put a card they find there into their hand, then shuffle the remaining cards back into that player's deck. At the end of the turn, if this card has 6 counters on it, discard it.