Jimmy the slim winny

Jimmy is unblockable
When jimmy etb each player discards their hands
and loses that much life, then each player draws
seven cards. Each player may then discard a
card, they gain life and add mana in any color
combination equal to the coverted mana cost
of the card to there mana pool at the beginning of
their next main phase if the combined cost of all
cards discarded is over ten exile Jimmy and
return him to the battlefield at the beginning of
your next pre combat main phase.