Bloodbraid Marauder

“Bloodbraid Marauder can't block. <br><em>Delirium</em> — This spell has cascade as long as there are four or more card types in your graveyard. <em>(When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)</em>”