Unspeakable Summonings

Search your library for a legendary creature card with converted mana cost X or less and put that card onto the battlefield.
Covenant - At the beginning of your upkeep, if Unspeakable Summonings is in your graveyard, you may pay {b}{b}. If you do, you draw a card and lose 1 life. If you don't, exile Unspeakable Summonings from your graveyard.