Whenever an artifact you control enters, Perimeter Patrol gets +1/+0 until end of turn.

Whenever Permeating Mass deals combat damage to a creature, that creature becomes a copy of Permeating Mass.

When Perrie enters, put a shield counter on target creature. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)

Whenever Perrie attacks, target creature you control gains trample and gets +X/+X until end of turn, where X is the number of different kinds of counters among permanents you control.

Persistent Marshstalker gets +1/+0 for each other Rat you control.

Threshold — Whenever you attack with one or more Rats, if seven or more cards are in your graveyard, you may pay . If you do, return Persistent Marshstalker from your graveyard to the battlefield tapped and attacking.

, : Target player mills a card. (They put the top card of their library into their graveyard.)

Tap four untapped Advisors you control: Target player mills twelve cards.

A deck can have any number of cards named Persistent Petitioners.

When Person of Interest enters, suspect it. Create a 2/2 white and blue Detective creature token. (A suspected creature has menace and can't block.)

When Persuasive Interrogators enters, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Whenever you sacrifice a Clue, target opponent gets two poison counters. (A player with ten or more poison counters loses the game.)

Flash

Flying

When Pestermite enters, you may tap or untap target permanent.

Pestilence Rats's power is equal to the number of other Rats on the battlefield. <I>(For example, as long as there are two other Rats on the battlefield, Pestilence Rats's power and toughness are 2/3.)</I>

: Pestilent Souleater gains infect until end of turn. ( can be paid with either or 2 life. A creature with infect deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Flying

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)

Celebration — At the beginning of combat on your turn, if two or more nonland permanents entered the battlefield under your control this turn, put a +1/+1 counter on Pests of Honor.

: Target player chooses a card name, then reveals the top card of their library. If that card has the chosen name, that player puts it into their hand. If it doesn't, the player puts it into their graveyard.

( can be paid with either or .)

When Petrahydrox becomes the target of a spell or ability, return Petrahydrox to its owner's hand.

This spell can't be countered.

Bloodthirst X (This creature enters with X +1/+1 counters on it, where X is the damage dealt to your opponents this turn.)

Protection from instants

Reach

When Petting Zookeeper enters, open an Attraction. (Put the top card of your Attraction deck onto the battlefield.)

: Regenerate Pewter Golem.

When Phage the Untouchable enters, if you didn't cast it from your hand, you lose the game.

Whenever Phage deals combat damage to a creature, destroy that creature. It can't be regenerated.

Whenever Phage deals combat damage to a player, that player loses the game.

Vigilance

Whenever an artifact you control enters, Phalanx Vanguard gets +1/+0 until end of turn.

Defender

When Phantasmal Abomination becomes the target of a spell or ability, sacrifice it.

Flying

When Phantasmal Dragon becomes the target of a spell or ability, sacrifice it.

: Phantasmal Fiend gets +1/-1 until end of turn.

: Switch Phantasmal Fiend's power and toughness until end of turn.

You may have Phantasmal Image enter as a copy of any creature on the battlefield, except it's an Illusion in addition to its other types and it has "When this creature becomes the target of a spell or ability, sacrifice it."

Flying

At the beginning of your upkeep, put a +1/+1 counter on Phantasmal Sphere, then sacrifice Phantasmal Sphere unless you pay for each +1/+1 counter on it.

When Phantasmal Sphere leaves the battlefield, target opponent creates an X/X blue Orb creature token with flying, where X is the number of +1/+1 counters on Phantasmal Sphere.

When Phantom Beast becomes the target of a spell or ability, sacrifice it.

Protection from black

Phantom Centaur enters with three +1/+1 counters on it.

If damage would be dealt to Phantom Centaur, prevent that damage. Remove a +1/+1 counter from Phantom Centaur.

Creature tokens you control get +1/+1.

Trample

Phantom Nantuko enters with two +1/+1 counters on it.

If damage would be dealt to Phantom Nantuko, prevent that damage. Remove a +1/+1 counter from Phantom Nantuko.

: Put a +1/+1 counter on Phantom Nantuko.

Trample

Phantom Nishoba enters with seven +1/+1 counters on it.

Whenever Phantom Nishoba deals damage, you gain that much life.

If damage would be dealt to Phantom Nishoba, prevent that damage. Remove a +1/+1 counter from Phantom Nishoba.

Flash

When Phantom Steed enters, exile another target creature you control until Phantom Steed leaves the battlefield.

Whenever Phantom Steed attacks, create a tapped and attacking token that's a copy of the exiled card, except it's an Illusion in addition to its other types. Sacrifice that token at end of combat.

Phantom Warrior can't be blocked.

Phantom Wurm enters with four +1/+1 counters on it.

If damage would be dealt to Phantom Wurm, prevent that damage. Remove a +1/+1 counter from Phantom Wurm.

Indestructible

As long as your devotion to black and green is less than seven, Pharika isn't a creature.

: Exile target creature card from a graveyard. Its owner creates a 1/1 black and green Snake enchantment creature token with deathtouch.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)

Escape—, Exile three other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Pharika's Spawn escapes with two +1/+1 counters on it. When it enters this way, each opponent sacrifices a non-Gorgon creature of their choice.

: Phelddagrif gains trample until end of turn. Target opponent creates a 1/1 green Hippo creature token.

: Phelddagrif gains flying until end of turn. Target opponent gains 2 life.

: Return Phelddagrif to its owner's hand. Target opponent may draw a card.

Indestructible

As long as your devotion to blue and black is less than seven, Phenax isn't a creature.

Creatures you control have ": Target player mills X cards, where X is this creature's toughness."

When Pheres-Band Brawler enters, it fights up to one target creature you don't control. (Each deals damage equal to its power to the other.)

Inspired — Whenever Pheres-Band Raiders becomes untapped, you may pay . If you do, create a 3/3 green Centaur enchantment creature token.

Inspired — Whenever Pheres-Band Tromper becomes untapped, put a +1/+1 counter on it.

When Phlage enters, sacrifice it unless it escaped.

Whenever Phlage enters or attacks, it deals 3 damage to any target and you gain 3 life.

Escape—, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Phoebe, Head of S.N.E.A.K. can't be blocked by creatures with flavor text.

: Phoebe permanently steals target creature's text box. (That creature loses all rules text, flavor text, and watermarks. This creature gains them.)

Flying, haste

: Phoenix of Ash gets +2/+0 until end of turn.

Escape—, Exile three other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Phoenix of Ash escapes with a +1/+1 counter on it.

When Phylath, World Sculptor enters, create a 0/1 green Plant creature token for each basic land you control.

Landfall — Whenever a land you control enters, put four +1/+1 counters on target Plant you control.

Flying

: Phyrexian Battleflies gets +1/+0 until end of turn. Activate no more than twice each turn.

, Sacrifice a creature: Put a +1/+1 counter on Phyrexian Broodlings.

Phyrexian Colossus doesn't untap during your untap step.

Pay 8 life: Untap Phyrexian Colossus.

Phyrexian Colossus can't be blocked except by three or more creatures.

Flying

, Sacrifice Phyrexian Debaser: Target creature gets -2/-2 until end of turn.

When Phyrexian Delver enters, return target creature card from your graveyard to the battlefield. You lose life equal to that card's mana value.

When Phyrexian Devourer's power is 7 or greater, sacrifice it.

Exile the top card of your library: Put X +1/+1 counters on Phyrexian Devourer, where X is the exiled card's mana value.