Vitae Pneumavores

When you cast Vitae Pneumavores, you may
search your library for a colorless creature card
with converted mana cost 7 or greater, reveal it,
then shuffle your library and put that card on top
of it.
The first creature spell you cast each turn costs {2} less to cast.
Some see and marvel at the scintillating beauty of the pneumavores. Others simply go mad.