Ring of Shock

during your turn creatures you control get +2/+2.
{1}: put 1 shock counter on Ring of Shock for each
creature that attacked this turn.
{1}{u}{w}: look at the top 5 cards in your library,
chose any number of those cards to put into your
hand and exile that many cards from your hand.
{2}{u}{w}: sacrifice Ring of Shock, you gain life
equal to the number of shock counters you have
on this card.