Odd, Alchemist

Ward {2}
You have no maximum hand size.
{3}{u}: Shuffle you library and draw a card.
{3}{w}: Deal 3 damage to any target
tapped creature.
{3}{r}: Gain control of target creature until the
end of your turn with mana value 3 or less.
{3}{g}: Exile a card from your graveyard and
put a card back to your hand.