Sheoldred, Planar Usurper

Eminence - At the beginning of your upkeep, if Sheoldred, Planar Usurper is in your command zone or the battlefield, you may have each opponent create a 0/0 black phyrexian germ token with a +1/+1 counter on it. If you don't, you get a poison counter.

Menace, Deathtouch

When Sheoldred enters, gain control of all creatures on the battlefield, then return all creatures in graveyards to your battlefield. These creatures are Phyrexians in addition to their other types.