Demonic Little Grey Cat

As long as Demonic Little Grey Cat is on the battlefield, all opponent's spells cost {2} more to cast and all of your creatures get +1+0.
Once per turn, you may flip a coin, if it lands on heads, exile your opponent's graveyard and draw two cards. If it lands on tails, exile your graveyard and draw three cards.
{t}Destroy target artifact or creature.