Chaldea Gate

{t}: Add one mana of any colour to your
mana pool.
{2}{t}: Sacrifice Chaldea Gate. You may look
at the top card of your library, if it is a
servant you may cast it without paying it's
mana costs.
The Organization for the Preservation of Human
Order, Chaldea is a secret agency founded with the
purpose of preventing the "certain extinction" of the
human race.