Jace, the Rainbow Bandit

+1: Put two rainbow counters on Jace, the Rainbow Bandit and one +1/+1 counter on target creature.
-5: Draw two cards, destroy one target creature and shuffle your graveyard into your deck.
-X: If Jace, the Rainbow Bandit has 15 or more rainbow counters, pay X to search for and play 5 creatures with converted mana cost X.