msem-instigator

Distribute three +1/+1 counters among any number of creatures you control.
Metamorph {1}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

Destroy target artifact.
Reprise {R} (As you cast an instant or sorcery spell, you may exile one card with reprise from your graveyard and pay its reprise cost. If you do, add its effects to that spell.)

Immolated Grave enters tapped.
{T}: Add {R}.
{2/R}{2/R}: Immolated Grave becomes a 3/1 red Elemental creature with first strike until end of turn. It's still a land.

Enchant creature
When Impassioned Craze enters, draw a card.
Enchanted creature has “{R}: This creature gets +1/+0 until end of turn.”

When Impatient Busker enters, you may put a lore counter on target Saga.

When Imperfect Stone enters, mill three cards.
{T}: Add one mana of any color.

{T}: Add {C}.
{4}, {T}, Put a -1/-1 counter on a creature you control: Draw a card.

At the beginning of your upkeep, scry 2.
Reveal the top card of your library: If a creature card with flying was revealed this way, Imperial Chimera gains flying until end of turn. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

Spirited (When this enters, you may activate one of its activated abilities without paying its cost.)
{1}, {T}: Add one mana of any color. When you do, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Trample
If a creature in Imperial Guardian's pack would deal damage to a permanent or player, it deals twice that much damage instead. (Two or more creatures you control with equal power are in a pack.)

Equipped creature gets +3/+2.
Equip {3}

Trample
Art of war — At the beginning of your end step, if Imperial Legion dealt damage to an opponent this turn, put two +1/+1 counters on it.

Imperial Marketplace enters with a charge counter on it.
{T}: Add {C}.
{T}, Remove a charge counter from Imperial Marketplace: Put a +1/+1 counter on target creature you control.

{T}: Add {C}. Activate only if you have less life and control fewer creatures than each opponent.

{T}: Add {C}.
{1}, Discard Imperial Port: Search your library for a basic land card, reveal it, and put it into your hand. Then shuffle.

Destroy target nonbasic land.

Spirited (When this enters, you may activate one of its activated abilities without paying its cost.)
{2}, Sacrifice Imperial Silks: Draw a card.
{2}, Sacrifice Imperial Silks: You gain 3 life.

Flash
You may cast this spell from your graveyard, but not from anywhere else. When you do, destroy target permanent.

Reach
Imperious Ram can't be blocked by more than one creature.

Trample
Madness {2}{G} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Whenever Impetuous Impetus deals combat damage to a player, you may sacrifice a land. If you do, Impetuous Impetus deals 3 damage to that player.

Enchant creature
When Impish Delights enters, draw a card.
Enchanted creature gets +2/+0.

{T}: Add {C}.
{T}: Add {C}{C}{C}. Spend this mana only to pay advance costs.

Motivate 2 (When this creature enters, you may motivate target creature with less power than this by putting two +1/+1 counters on it.)

Reach
{1}, Sacrifice a nonland permanent: Imposing Manticore deals 1 damage to each opponent.