msem-instigator

{T}, Tap an untapped creature you control: Add one mana of any color.

Defender
Whenever you cast an enchantment, instant, or sorcery spell, scry 1 if it's the first time this ability has resolved this turn. If it's the second time, Prismscale Piranhas can attack this turn as though it didn't have defender. If it's the third time, whenever Prismscale Piranhas deals combat damage to a player this turn, draw a card.

As Pristine Chapel enters, you may pay 3 life. If you don't, it enters tapped.
{T}: Add {W}, {B}, or {G}.

Pristine Delta enters tapped.
{T}: Add {W} or {U}.
{2}{W}{U}, {T}, Sacrifice Pristine Delta: Draw a card.

({T}: Add {G}, {U}, or {R}.)
Pristine Dominion enters tapped.

Private Library enters tapped.
When Private Library enters, look at the top card of your library. You may put it into your graveyard.
{T}: Add {W} or {U}.

Surveil 1, then draw a card. You lose 1 life.
Flashback—{B}, Sacrifice a creature. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Target creature gains indestructible until end of turn. You gain 4 life.
Prophecy {G} (Once each turn, you may exile a card with prophecy as you reveal it. When you do, you may cast it for its prophecy cost as long as it's exiled.)

Prowess
Whenever Prodigal Spark is dealt damage, it deals that much damage to any target.

Flash
Flying
Prodigious Panya has base power and toughness 4/4 during extra turns.

Flying, lifelink
Pay 5 life: Put target permanent card in a graveyard onto the battlefield under your control.

If Professor Haldean would leave the battlefield, exile him instead.
Whenever you cast a spell, you may untap Professor Haldean and another target permanent.
{T}: Professor Haldean deals 1 damage to each opponent.

Whenever Professor's Assistant becomes tapped, add {R}. Until end of turn, you don't lose this mana as steps and phases end.

Target player reveals their hand. You choose a nonland card from it. That player discards that card.
Conjure a card named Fatigue and put it on top of your library. (It's a colorless sorcery that costs {2} with “Draw a card.”)

Equipped creature gets +0/+3.
Whenever equipped creature dies, draw a card.
Equip {3}

Scry 1. Draw a card. Scry 1.

You may play Promethean Grotto from your graveyard.
{T}: Add {C}.
Cycling {2} ({2}, Discard this card: Draw a card.)

Once each turn, when an Aura is attached to Prop Custodian or you cast a spell that targets it, you may audition for white. (Create a 1/1 Construct Actor creature token, a Scout Role giving 2/3 and vigilance, or a Cleric Role giving 2/2 and lifelink. Roles replace older ones.)

Foretell {X}{B} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)
Target creature gets -X/-X until end of turn. If this spell was foretold, you gain X life.

When Prophet of Reclamation dies, mill three cards, then return up to one land card from your graveyard to your hand.

Haste
When Prophetic Flame dies, scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

Return target creature card from your graveyard to your hand.
Augmented — If you've spent {W}{U}{B}{R}{G} to cast spells this turn, return it to the battlefield instead.

Protector of the Gates can't attack unless it's equipped, enchanted, or has a card inscribed onto it.

Sacrifice Proud Lion: Counter target spell that targets you.
Ride {1}{W} ({1}{W}: Transform this and attach it to target creature you control without a Steed. Ride only as a sorcery.)

{T}, Pay 1 life: Add {G} or {W}.
{2}, {T}, Sacrifice Provincial Hamlet and another permanent: Draw a card. Activate only during your turn.