Phyrexian Slayer

Flying
Whenever Phyrexian Slayer becomes blocked by a white creature, destroy that creature. It can't be regenerated.

Reprocess

Sacrifice any number of artifacts, creatures, and/or lands. Draw a card for each permanent sacrificed this way.

Planar Portal

{6}, {T}: Search your library for a card, put that card into your hand, then shuffle.

Ertai, the Corrupted

{U}, {T}, Sacrifice a creature or enchantment: Counter target spell.

Plague Spores

Destroy target nonblack creature and target land. They can't be regenerated.

Phyrexian Infiltrator

{2}{U}{U}: Exchange control of Phyrexian Infiltrator and target creature. (This effect lasts indefinitely.)

Phyrexian Reclamation

{1}{B}, Pay 2 life: Return target creature card from your graveyard to your hand.

Phyrexian Reaper

Whenever Phyrexian Reaper becomes blocked by a green creature, destroy that creature. It can't be regenerated.

Planar Overlay

Each player chooses a land they control of each basic land type. Return those lands to their owners' hands.

Wall of Junk

Defender (This creature can't attack.)
When Wall of Junk blocks, return it to its owner's hand at end of combat. (Return it only if it's on the battlefield.)

Phyrexian Purge

This spell costs 3 life more to cast for each target.
Destroy any number of target creatures.

Destructive Flow

At the beginning of each player's upkeep, that player sacrifices a nonbasic land of their choice.