Thanos

{w}{w}{w}{u}{u}{u}{b}{b}{b}{r}{r}{r}{g}{g}{g}: Flip a coin for each opponents creature, exile all that come up tails.
{w}{w}{w}: Gain control of target creature
{u}{u}{u}: Reorder the top 7 cards of your library.
{b}{b}{b}: Destroy target creature or planeswlaker
{r}{r}{r}: Find a card from your library and put it in
your hand, shuffle your deck
{g}{g}{g}: Untap 3 cards
{r/w}{r/w}{r/w}: Target creature gains +3/+3