Jodah, the Unified

Phyrexian creatures you control get +X/+X,
where X is the number of Phyrexian creatures
you control.
Whenever you cast a Artifact or Phyrexian
spell from your hand, exile cards from the
top of your library until you exile a Artifact
or Phyrexian nonland card with lesser
mana value. You may cast that card without
paying its mana cost. Put the rest on the
bottom of your library in a random order.