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.)

, , Sacrifice Protomatter Powder: Return target artifact card from your graveyard to the battlefield.

Partner with Impetuous Protege (When this creature enters the battlefield, target player may put Impetuous Protege into their hand from their library, then shuffle.)

, : Tap target creature.

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

Whenever you sacrifice another creature, exile it. If that creature was a token, put a +1/+1 counter on Prowling Geistcatcher.

When Prowling Geistcatcher leaves the battlefield, return each card exiled with it to the battlefield under your control.

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.

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

As Psychic Allergy enters the battlefield, choose a color.

At the beginning of each opponent's upkeep, Psychic Allergy deals X damage to that player, where X is the number of nontoken permanents of the chosen color they control.

At the beginning of your upkeep, destroy Psychic Allergy unless you sacrifice two Islands.

Whenever a player chooses one or more targets, each player reveals the top card of their library. The player who reveals the card with the highest mana value may change the target or targets. If two or more cards are tied for highest, the target or targets remain unchanged. Changing targets this way doesn't trigger abilities of permanents named Psychic Battle.

Defender (This creature can't attack.)

Whenever Psychic Membrane blocks, you may draw a card.

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.

Counter target spell. Its controller mills two cards.

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.)

At the beginning of your upkeep, put a spore counter on Psychotrope Thallid.

Remove three spore counters from Psychotrope Thallid: Create a 1/1 green Saproling creature token.

, Sacrifice a Saproling: Draw a card.

Pterodon Knight has flying as long as you control a Dinosaur.

Enchant creature

All creatures attack enchanted creature's controller each combat if able.

When enchanted creature dies, draw a card.

Public Thoroughfare enters the battlefield tapped.

When Public Thoroughfare enters the battlefield, sacrifice it unless you tap an untapped artifact or land you control.

: Add one mana of any color.

, : Target creature you control gets +X/+X until end of turn. Destroy it at the beginning of the next end step.

Put target face-up exiled card into its owner's graveyard.

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."

Return target creature or land card from a graveyard to its owner's hand. You gain 6 life.

You gain 4 life. Then if an opponent has more life than you, return Pulse of the Fields to its owner's hand.

Draw two cards, then discard a card. Then if an opponent has more cards in hand than you, return Pulse of the Grid to its owner's hand.

Whenever Pulse Tracker attacks, each opponent loses 1 life.

You may sacrifice two Mountains rather than pay this spell's mana cost.

Destroy all artifacts.

Wither (This deals damage to creatures in the form of -1/-1 counters.)

Puncture Blast deals 3 damage to any target.

Counter target spell. Its controller loses 3 life and you gain 3 life.

Punishing Fire deals 2 damage to any target.

Whenever an opponent gains life, you may pay . If you do, return Punishing Fire from your graveyard to your hand.

Target creature gets -2/-2 until end of turn. (Then exile this card. You may cast the creature later from exile.)

Enchant creature

When enchanted creature dies, return that card to its owner's hand. If that card is returned to its owner's hand this way, you may pay . If you do, return Puppet Master to its owner's hand.