msem-instigator

{1}, {T}: Tap target nonartifact creature.

Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.)
At the beginning of your end step, if you cast no spells this turn, exile the top card of your library. If it's a nonland card, you may cast it without paying its mana cost.

You may play this card transformed.
Trample

(As an Encounter enters, choose an opponent to protect it. You and others can attack it. When defense counters are removed, create a 0/0 Army token if you don't control one, then put that many +1/+1 counters on a Army you control.)
When Settling of Nizev enters, look at the top four cards of an opponent's library, exile two of them, and put the rest on the bottom of their library in a random order. You may play those cards for as long as they remain exiled, and mana of any type can be spent to cast them.

Enchant creature
You choose whether enchanted creature attacks each combat rather than its controller (after its controller chooses which of their other creatures attack. That player still chooses the player or planeswalker it attacks.)

Distorted (This creature can be blocked by tapped creatures but not untapped creatures.)

You draw a card and you lose 1 life.
Whenever you cast a spell from anywhere other than your hand, you may pay 1 life. If you do, return Desolate Advance from your graveyard to your hand.

{1}, {T}: Add one mana of any color.
{1}, {T}, Sacrifice Heavy Moneybag: Post a bounty on target creature or planeswalker. Activate only as a sorcery. (Put a bounty counter on that creature. It has “When this creature dies, each opponent draws a card” as long as it has a bounty counter on it.)

Flying
Augmented — Whenever Station Repair Technician enters or attacks, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, creatures you control gain flying until end of turn.

{T}: Add {C}.
{3}, {T}, Sacrifice No-Man's Land: Draw a card.

Vision (Whenever this or another creature you control enters, reveal the top card of your library. Then you may put that card into your graveyard.)
Whenever Weaver of the Winds envisions an instant or sorcery card, draw a card.

Flash
If a spell or ability an opponent controls would cause you to discard a creature card, you may put that card onto the battlefield instead.

{1}{B}: Blightcaller Shaman gains deathtouch until end of turn.

{T}: Tap target creature with power less than or equal to Charmer of the Folded Fan's toughness.

Menace
Whenever you cast a noncreature spell, Enduring Charge gets +1/+1 until end of turn.

Menace
At the beginning of your end step, if a player lost 3 or more life this turn, put a +1/+1 counter on target Azra or Demon you control.

Starting with you, each player may sacrifice a creature. Each player that doesn't loses life equal to the total power of creatures sacrificed this way.

Target creature gets +4/+3 until end of turn. Put a trample counter on it.

Equipped creature gets +1/+1.
As long as equipped creature is multicolored, it gets an additional +1/+1.
Equip {1}

Target player sacrifices a creature.
Fabled {2}{B} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that player.)

Target creature you control gets +2/+2 until end of turn. If it's attacking, it gains indestructible until end of turn.

When Dusk Lieutenant enters, forebode. (Create a tapped colorless Omen artifact token with “{T}, Discard a card, Sacrifice this artifact: Draw a card.”)
Once each turn, when you discard a card during your turn, each opponent discards a card.

Zealous Rabble gets +1/+1 for each creature token you control.
At the beginning of your end step, if you're horrific, create a token that's a copy of Zealous Rabble, except it doesn't have this ability. (You're horrific as long as you've sacrificed a permanent or discarded a card this turn.)

{T}: Add {C}.
{5}, {T}, Sacrifice War Golem Forge: Create a 3/3 colorless Golem artifact creature token.

{2}{G}: Target face-down creature you control becomes a Beast with base power and toughness 5/5 until end of turn.