Red Book of Westmarch

Whenever you cast a legendary spell, draw a card.
{2}, {t}, Sacrifice Red Book of Westmarch: Look
at the top five cards of your library. You may
reveal a legendary creature card from among
them and put it into your hand. Put the rest on
the bottom of your library in any order.
"I have quite finished, Sam. The last few pages are
for you."
—Frodo Baggins