msem-instigator

Counter target spell unless its controller pays {X}. You may cast a spell with mana value X or less from your hand without paying its mana cost.

(Transform this if it's not attached to a creature. Pay {G} as a sorcery to unattach it.)
Enchant creature you control
When this permanent transforms into Packbond Mount, move all +1/+1 counters from it to its rider.
Packbond Mount's rider gets +1/+1.
{2}{G}: Put a +1/+1 counter on Packbond Mount's rider.

Foretell {3}{W} (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.)
This spell's foretell cost costs {3} less to pay if you have 5 or less life.
You gain 10 life.

Enchant creature
When Paid in Blood enters the battlefield, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)
Enchanted creature gets +1/+1 and has lifelink.

First strike
Civilized — Whenever Palace Enforcer attacks, if you control an artifact, a creature, and an enchantment, Palace Enforcer gains deathtouch and lifelink until end of turn.

Sacrifice a creature: Pale Horse gets +2/+2 until end of turn.
Ride {B} ({B}: Transform this and attach it to target creature you control without a Mount. Ride only as a sorcery.)

Menace
Landfall — Whenever a land enters the battlefield under your control, create two 1/1 red and white Warrior creature tokens with haste. Exile them at the beginning of the next end step.

Enchant land
Enchanted land has “{T}: When target creature deals combat damage to an opponent this turn, draw a card. Activate only as a sorcery.”

Patent Thief gets +1/+1 and can't be blocked as long as an artifact was put into your graveyard from the battlefield this turn.

When Paths Untaken enters the battlefield, draw a card.
If a spell or ability would have you choose a card name, you may choose two card names instead. (It follows the same restrictions. Effects of that spell or ability apply for each name chosen for it.)

Pathway of Lost Sultans enters the battlefield tapped.
When Pathway of Lost Sultans enters the battlefield, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.

Flying
Whenever you foretell a card or cast a foretold spell, each opponent loses 3 life unless they sacrifice a creature or discard a card.

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

Pierce the Sky deals 7 damage to target creature with flying.

Unattach all Equipment from target creature. Piercing Blow deals 3 damage to that creature.

When Pilgrim of Bal enters the battlefield, you may search your library and/or graveyard for an Aurashaper or Curse card, reveal it, and put it into your hand. If you searched your library, shuffle.

Whenever Pineblight Caribou enters the battlefield or attacks, you may have it consume a land. If you do, draw a card and you gain 2 life. (To consume a land, sacrifice a land or exile a land card from your graveyard.)

When Plane-Traversal Guide enters the battlefield, you may exile a card you own from outside the game. When Plane-Traversal Guide is no longer on the battlefield, put the exiled card into your hand.

Foretell {1}{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.)
If this spell is foretold, you may cast it as though it had flash.
Target creature gets -3/-3 until end of turn.

Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)
Whenever a creature you control with a +1/+1 counter on it deals combat damage to a player, arm that creature. (Create a colorless Equipment artifact token with “Equipped creature gets +1/+0” and equip {2}, then attach it to that creature.)

Enchant creature
Enchanted creature has infiltrate. (Whenever one or more attacking creatures you control aren't blocked, enchanted creature gets +1/+1 until end of turn.)
Whenever enchanted creature deals combat damage to a player, draw a card.

{1}, {T}: Return target creature you control and each Aura attached to it to their owners' hands. Activate only as a sorcery.

Return target artifact or creature card from your graveyard to your hand.
Draw a card.

Gain control of target non-Pirate, non-Rogue creature until end of turn. Untap that creature. It gains haste until end of turn. Pirates and Rogues you control get +1/+0 until end of turn.

When Press-Gang Recruiter enters the battlefield, create a Treasure token.
{5}, {T}, Sacrifice an artifact: Gain control of target artifact or creature until end of turn. Untap that permanent. It gains haste until end of turn. Activate only as a sorcery.