Horn of Gondor

{4}, {t}: Untap target attacking creature an
opponent controls and remove it from battle.
{x}, Sacrifice Horn of Gondor: Look at the top X
cards of your library and reveal target creature
card with converted mana costs X or less and put
it into your hand. Then shuffle your library.
Tipped with silver and written with ancient characters,
it was said to be audible at any place in Gondor when winded.