Protean Hydra enters the battlefield with X +1/+1 counters on it.

If damage would be dealt to Protean Hydra, prevent that damage and remove that many +1/+1 counters from it.

Whenever a +1/+1 counter is removed from Protean Hydra, put two +1/+1 counters on it at the beginning of the next end step.

Constellation — Whenever an enchantment enters the battlefield under your control, you may have Protean Thaumaturge become a copy of another target creature, except it has this ability.

Kicker (You may pay an additional as you cast this spell.)

If this spell was kicked, create a 1/1 white Soldier creature token.

Counter target spell unless its controller pays for each creature you control.

At the beginning of your upkeep, repeat the following process for each opponent in turn order. Reveal the top card of your library. That player may pay life equal to that card's mana value. If they do, exile that card. Otherwise, put it into your hand.

When Protective Parents dies, create a Young Hero Role token attached to up to one target creature you control. (If you control another Role on it, put that one into the graveyard. Enchanted creature has "Whenever this creature attacks, if its toughness is 3 or less, put a +1/+1 counter on it.")

When Protector of Gondor enters the battlefield, create a 1/1 white Human Soldier creature token.

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

When Proteus Machine is turned face up, it becomes the creature type of your choice. (This effect lasts indefinitely.)

When Protocol Knight enters the battlefield, tap target creature an opponent controls. Put a stun counter on that creature if you control another Knight. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Imprint — When Prototype Portal enters the battlefield, you may exile an artifact card from your hand.

, : Create a token that's a copy of the exiled card. X is the mana value of that card.

When Proud Pack-Rhino enters the battlefield, choose one —

• Put a shield counter on target permanent. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)

• Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Eternalize (, Exile this card from your graveyard: Create a token that's a copy of it, except it's a 4/4 black Zombie Human Warrior with no mana cost. Eternalize only as a sorcery.)

When Provisions Merchant enters the battlefield, create a Food token. (It's an artifact with ", , Sacrifice this artifact: You gain 3 life.")

Whenever Provisions Merchant attacks, you may sacrifice a Food. If you do, attacking creatures get +1/+1 and gain trample until end of turn.

Provoke the Trolls deals 3 damage to any target. If a creature is dealt damage this way, it gets +5/+0 until end of turn.

Living metal (As long as it's your turn, this Vehicle is also a creature.)

Whenever another creature or Vehicle enters the battlefield under your control, put a +1/+1 counter on Prowl. If this is the second time this ability has resolved this turn, convert Prowl.

Equipped creature can't be blocked except by Walls.

Equip

Vigilance

Landfall — Whenever a land enters the battlefield under your control, put a +1/+1 counter on Prowling Felidar.

Prowling Nightstalker can't be blocked except by black creatures.

This spell can't be countered.

Creature spells you control can't be countered.

Draw four cards, then discard two cards.

Flying

: Target creature gains flying until end of turn.

: Psionic Entity deals 2 damage to any target and 3 damage to itself.

Counter target noncreature spell. (Then exile this card. You may cast the creature later from exile.)

All Sliver creatures have ": This creature deals 2 damage to any target and 3 damage to itself."

Discard a card: Psychatog gets +1/+1 until end of turn.

Exile two cards from your graveyard: Psychatog gets +1/+1 until end of turn.

Counter target creature spell. Its controller loses 1 life.

Whenever you draw a card, each opponent mills two cards.

Whenever Psychic Frog deals combat damage to a player or planeswalker, draw a card.

Discard a card: Put a +1/+1 counter on Psychic Frog.

Exile three cards from your graveyard: Psychic Frog gains flying until end of turn.

Target opponent reveals their hand. You choose a nonland card from that player's graveyard or hand and exile it. You may cast that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast that spell.

Target player discards a card. If a land card is discarded this way, return Psychic Miasma to its owner's hand.

Enchant permanent

When Psychic Overload enters the battlefield, tap enchanted permanent.

Enchanted permanent doesn't untap during its controller's untap step.

Enchanted permanent has "Discard two artifact cards: Untap this permanent."

When Psychic Pickpocket enters the battlefield, it connives. When it connives this way, return up to one target nonland permanent to its owner's hand. (To have a creature connive, draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on that creature.)

You may tap or untap target permanent.

Splice onto Arcane (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Counter target instant or sorcery spell that targets you.

Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, you may copy the spell countered this way. You may choose new targets for the copy.

Shuffle all cards from your graveyard into your library. Target player mills that many cards.

Whenever an opponent shuffles their library, you may look at the top two cards of that library. You may exile one of those cards. Then put the rest on top of that library in any order.

Target player reveals their hand. You choose an instant or sorcery card from it and exile that card. You may cast that card for as long as it remains exiled. At the beginning of the next end step, if you haven't cast the card, return it to its owner's hand.

If the difference between your life total and target player's life total is 5 or less, exchange life totals with that player.

Cumulative upkeep—Draw a card. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

At the beginning of your end step, sacrifice a land and discard your hand.

Flying

Harbinger of Despair — Whenever Psychomancer or another nontoken artifact you control is put into a graveyard from the battlefield or is put into exile from the battlefield, target opponent loses 1 life and you gain 1 life.

Target player reveals their hand and the top card of their library. You choose a card revealed this way. That player puts the chosen card on the bottom of their library.

Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Psychotic Haze deals 1 damage to each creature and each player.

Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Flying

: Adapt 4. This ability costs less to activate for each instant and sorcery card in your graveyard. (If this creature has no +1/+1 counters on it, put four +1/+1 counters on it.)

Flying

Sacrifice Pteron Ghost: Regenerate target artifact.

Destroy target creature an opponent controls. Each other creature that player controls gets -2/-0 until end of turn.

At the beginning of your upkeep, you may exchange control of target nonland permanent you control and target nonland permanent an opponent controls with equal or lesser mana value.

Whenever Pugnacious Hammerskull attacks while you don't control another Dinosaur, put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Put up to two target creature cards from a single graveyard onto the battlefield under your control. They gain haste until end of turn. Sacrifice them at the beginning of the next end step.

Return up to one target instant card and up to one target sorcery card from your graveyard to your hand. Exile Pull from the Deep.

Target creature gets -5/-5 until end of turn.

All Sliver creatures have flying.

All Slivers have "If this permanent would be put into a graveyard, you may put it on top of its owner's library instead."