Arngeir, Wise Greybeard

Shout spells you cast cost {1} less to cast.

Sky Above— {w}{u}{b}{r}{g}, {t}: Search your library for Shout card. You may cast that spell without paying its mana cost. If you don't, put it into your hand. Shuffle your library.

Voice Within— Each Shout card in your graveyard has flashback. The flashback cost is equal to that card's mana value.