Sheoldred's Unholy Prophecy

Whenever a nontoken creature you control dies,
you may search your library for a creature card
with equal or lesser mana value and put it onto
the battlefield, then shuffle. That creature
becomes a Phyrexian in addition to its other
types and enters with an infect counter.
"How dare Norn treat me like this! She will see! They
will all see! I will take all of Phyrexia for my own!"