Rejuvinating death

{t}Add mana equal to the amount of cards in
your grave yard
{b}{b}{t}deal damage to target player equal to the converted mana cost of cards in a target players gravyard
{r}{r}{r}{6}{t}Gain life equal to the number of
cards in target players graveyard.
{10}{ut}Sacrifice "Rejuvinating Death" shuffle all of
the cards in your graveyard into your library.