
Sorcery
Each player mills ten cards. For each player, choose a creature or planeswalker card in that player's graveyard. Put those cards onto the battlefield under your control. Then each creature you control becomes a Phyrexian in addition to its other types.

Black top-end reanimation, returning all creatures from all graveyards under your control.

Mass reanimation that fills and exploits graveyards similarly.

Big black reanimation alternative; both are heavy finishers.

Cheap single-target reanimation pulling a creature from any graveyard.

Efficient reanimation spell for returning a key creature.

Flexible reanimation, can steal opponents' creatures too.

Steals creatures from all opponents' graveyards, similar effect on a body.

Mills and reanimates from all graveyards as a similar mass-steal payoff.
The cards you choose can be ones that were just milled or ones that were already in the graveyard.
The creatures you control will be Phyrexians until they leave the battlefield. Any of them that stops being a creature will also stop being a Phyrexian until it becomes a creature again, if applicable.