Hexcraft

As Hexcraft enters the battlefield, exile a card
from target player's graveyard.
{2}: Hexcraft becomes a copy of target creature
card a player owns in exile, except that it's
colorless instead of its normal colors.
{x}, {t}: Cast a copy of target instant or sorcery
card a player owns in exile. Spend mana as
though it were mana of any color to do so.