Embodiment of Six

You may sacrifice any number of black creatures
with total converted mana cost 6 rather than pay
this spell's mana cost.
Indestructible
Transfigure {6} ({6}, Sacrifice this creature: Search
your library for a creature card with the same
converted mana cost as this creature and put that card
onto the battlefield. Then shuffle your library. Transfigure only as a sorcery.)