Cthulu, the Great Old One

Flying, Indestructible. Any swamps, or islands you control can produce any color manna.
Whenever you are about to draw cards, Scry 2 for
every card you are about to draw.
{1}{u}{u}{b}{t} Look at the top 5 cards of any players library, choose one card and put it into your hand, Exile the rest.
{1}{b}{b} Sacrifice a creature, draw 2 cards.
{1}{u}{b}{b}{t} Sacrifice a creature, discard a card.
Take an exiled card from any player and shuffle
it into your library.