Machinedrum

{1}{t}: Discard a card, then draw a card
{2}{t}: Draw a card, then discard a card
{3}{t}: Discard a card and shuffle two cards from your hand into your library: Draw two cards
{4}{t}: Shuffle two cards from your hand into your library: Draw two cards, then discard a card.
You never quite know where the Machinedrum will take you..