Rezzen Bur, Vicious Iconoclast

{1}{u}{b}, {t}: Target player discards a card. You put a number of cards from the top of your library into your graveyard equal to the converted mana cost of the discarded card. Then, you may return up to two target creature cards from your graveyard to your hand. Activate this ability only any time you could cast a sorcery.
"The Council cherishes some mystical 'sacredness' of life. But you see, if they could only cast aside this prepos