msem-instigator

Gain control of target noncreature, nonland permanent with mana value X.

Deception {2}{B} ({2}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Agent of Long Shadows deals combat damage to a player, you may put a Rogue card from your hand or graveyard onto the battlefield.

Deception {1}{B}
When Aguri, Shadow of Doubt enters, target player reveals their hand. You choose a nonland card from it. That player discards that card. You lose 2 life.

Haste
Spirited (When this creature enters, you may activate one of its activated abilities without paying its cost.)
{1}{R}: Akaima Rager gets +1/+0 until end of turn.

When Ancestral Council enters, search your library for an instant or sorcery card with mana value 2 or less, reveal it, put it into your hand, then shuffle.

Flash
When Aokara Redeemer enters, exile another target permanent you control. Return that card to the battlefield under your control at the beginning of the next end step.

Whenever you cast a spell, draw a card if that spell has the same name as a card in your graveyard.

Haste
{T}, Sacrifice a creature: Ashspeaker deals 1 damage to any target.

When you cast Aspect of Shifting Storms, create a token that's a copy of it.
You may have Aspect of Shifting Storms enter as a copy of any creature on the battlefield, except if it's a token it has no mana cost.

Menace
Whenever a creature you control deals combat damage to a permanent, that permanent's controller sacrifices it.

You may cast target instant card from your graveyard this turn. If a card cast this way would be put into your graveyard, exile it instead.

Target player discards a card. Return a creature card from your graveyard to your hand.

Target creature and all other creatures with the same name as that creature get +2/+0 until end of turn.

Chamber of Splendor enters tapped.
When Chamber of Splendor enters, you may pay {1}. If you do, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)
{T}: Add {C}.

Flash
Flying
When Champion of the Provinces enters, return any number of other permanents you control to their owner's hands.

When Chigau, the Red Market enters, draw a card, then choose a creature card name.
Once each turn, you may cast a creature spell with the chosen name from your graveyard.

When Chiheisen, Terrace of Serenity enters, draw a card, then choose a creature card name.
Spells you cast with the chosen name cost {2} less to cast.

Whenever another creature you control dies, target player loses 1 life and you gain 1 life.

Whenever you cast a spell, Daughter of Suisei deals 2 damage to target opponent if that spell has the same name as a card in your graveyard.

When Deathless Disciple dies, if it's not a token, create a token that's a copy of it, except it has no mana cost.
Revive {6}{B} ({6}{B}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Counter target spell unless its controller pays {2} plus an additional {2} for each card named Diffuse in your graveyard.

First strike, haste
Whenever you cast a spell, Double-Edged Duelist gains double strike until end of turn if that spell has the same name as a card in your graveyard.

Spirited (When this creature enters, you may activate one of its activated abilities without paying its cost.)
{3}{G}: Mill three cards. Target creature gets +X/+X and gains trample until end of turn, where X is the number of land cards in your graveyard.

Prowess
Whenever Dragon's Eye Spiritualist attacks, the next spell you cast this turn costs {1} less to cast.

{T}: Add {C}.
{T}: Target land you control becomes the basic land type of your choice until end of turn.