Bargain House

{4}: Return Bargain House from exile to the battlefield under your control. Any player may activate this ability.
Counter all spells cast from your hand. When a
spell is countered this way, mill cards from the
top of your library until you mill a card that
shares a card type with the spell countered. Play
that card without paying for its mana cost.
Exile Bargaining House at the beginning of your
end step.