msem-instigator

When Parrying Scholar enters, target creature gets +0/+3 until end of turn.

Whenever Passionate Painter becomes untapped, you may discard a card. If you do, draw a card, then transform Passionate Painter.

Whenever Path Lighter deals combat damage to a player, it explores. (Reveal the top card of your library. Put it into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then you may put that card in your graveyard.)

Patient Optimizer gets +4/+4 as long as it has four or more kinds of counters on it.
Whenever you draw your second card each turn, upgrade Patient Optimizer. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Flying
• Hexproof
• Prowess

{3}{B}: Judge another target creature you control. Activate only as a sorcery. (Honor it by putting a +1/+1 counter on it or condemn it by sacrificing it to draw a card.)

{R}: Paw Valley Wildclaw gets +1/+0 until end of turn. When this makes its power exactly 4, add {R}{R}{R}.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
When Paygan Archer dies, it deals damage to target player or planeswalker equal to its power.

Flying, lifelink

When Peddler of Commonwares enters, you may draw a card. If you do, discard a card.

Whenever Pelaski Valiant becomes tapped, target creature gets +1/+1 until end of turn.

Whenever you cast a spell that doesn't share a color with Pelt Mystic, you may scry 1.

Green creatures you control have “{T}: Add one mana of any color.”
Red creatures you control have “{1}, {T}: This creature deals 1 damage to target player.”
White creatures you control have “{2}, {T}: Tap target nonland permanent.”

Trample
Whenever a token you control enters, put a +1/+1 counter on target creature.

Whenever Perfecting Forgemaster enters or attacks, you may sacrifice an artifact. If you do, look at the top six cards of your library. You may reveal an Equipment card from among them. Put it onto the battlefield if its mana value is less than or equal to the sacrificed artifact's mana value. Otherwise, put it into your hand. Then shuffle.

First strike
Prevent all damage that would be dealt to creatures you control by sources with greater mana value.
{2}{W}{W}: Create a 1/1 colorless Construct Actor creature token. Put a vigilance counter on it.

At the beginning of your upkeep, each player discards a card. Then if a player has no cards in hand, you may transform Performer of Ambition.

{U}, {T}: Sacrifice any number of nontoken creatures. Create an X/X blue Horror creature token, where X is the total power of those creatures. Then if X is 4 or greater, you may transform Performer of Brilliance.

{1}{R}: Performer of Desire gets +1/+1 and gains menace until end of turn. Then if its power is 4 or greater, you may transform it.

Performer of Winds can't be blocked.
When Performer of Winds enters, remove a counter from up to one target permanent you control.

Trample
When Pernicious Primavore enters or dies, destroy up to three target artifacts and/or enchantments.

When Persecution Official enters, choose a creature card name.
Cards with the chosen name can't be cast.

{2}{B}, {T}, Sacrifice another creature: Each opponent loses 2 life and you gain 2 life.

Deathtouch
When Pestilent Scavenger enters, you may mill three cards.

Whenever another creature you control enters, put a +1/+1 counter on a creature you control.

Colossal 2—{1}{G}{G} (You may cast this for its colossal cost to have it enter with two +1/+1 counters; or pay {1}{G}{G} as a sorcery: Put two +1/+1 counters on it if it has none.)
Whenever a permanent you control with a counter on it becomes the target of a spell or ability an opponent controls, draw a card.