NOTE: This card has been removed from the game, and has been replaced with Slowing.
Sharing was a Patience deck specific effect card. When used, it allowed both players to draw a card. This was good if the opponent gets a full hand from it, causing them to lose a card on their turn, similarly to using the Annoying Dog.
However, it also made the opponent run out of cards in their deck quicker. This was the main point of Patience, as its ability used to be killing the opponent right away once they took 'Empty Deck Draw Damage'.
The other card that has been removed was Heal Delivery.