Infinite Greg

You have no maximum hand size.
{x}{x},{t}: scry {x} times.
{x}{x}, {t}: exile up to {x} cards you control.
{t}: return all cards you control
in exile tapped to the battlefield.
{1},{t}: shuffle your hand into your library.
Draw that many cards.
{w}{u}{b}{r}{g}: your opponents shuffle their hands
into their library and draw that many cards. You
may look at any card drawn this way.