The mouth of Sauron

When The mouth of Sauron comes into play
you may search your library for a legendary
creature called Sauron, the necromancer and
put it in your hand. (You can't play It this turn)
When The mouth of Sauron comes into play
and you have in your hand a legendary creature
called Sauron, the necromancer, it cost {3} less
to be played.
(It is the Sauron's will)