Underlord Xallos-Rend

Flying, trample
Traverse- Sacrifice three creatures (As you search
your library, you may cast this card from you library
if you pay its traverse cost in addition to its mana cost.)
Exile three creatures from your graveyard: Add {b}{b}{b}, then search your library for a card and
put that card either on the top of your library or
into your graveyard. Shuffle your library.