Conduit of Ruin

Condutor da Ruína (Conduit of Ruin) (pt)

Creature - Eldrazi | Power/Toughness: 5 / 5 (CMC 6)
When you cast this spell, you may search your library for a colorless creature card with mana value 7 or greater, reveal it, then shuffle and put that card on top.
The first creature spell you cast each turn costs less to cast.