msem-instigator

You may cast target instant or sorcery card from your graveyard this turn. If that spell would be put into your graveyard, exile it instead.

Choose target card in a graveyard other than a basic land card. Search its owner's graveyard, hand, and library for any number of cards with the same name as that card and exile them. Then that player shuffles.
Scry 1.

When Presence of the Unknown enters, you may sacrifice a creature. When you do, exile target nonland permanent.
Whenever a creature you control dies, each opponent loses 1 life and you gain 1 life.

Equipped creature gets +2/+1.
Whenever equipped creature blocks or becomes blocked by a creature, it deals 2 damage to that creature.
Equip {2}

At the beginning of each player's draw step, that player draws an additional card.

Vigilance
When Emirik Patrol enters, create two 1/1 white Human creature tokens.

{2}, {T}, Sacrifice Virtual Terrain: Search your library for a land card, put it onto the battlefield tapped, then shuffle.

Bjarndyr Bruiser gets +2/+2 as long as it's embattled. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Whenever a creature token you control deals combat damage to an opponent, it deals that much damage to each other opponent.
At the beginning of combat on your turn, you may sacrifice another creature. If you do, create a 2/2 red, white, and black Knight creature token with haste.

When Paleolizard enters, you may discard a card. When you do, return target card from your graveyard to your hand that shares a type with that card.

When Howler Sellout enters, for each creature that died this turn, post a bounty on up to one target creature an opponent controls. (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.)

Target opponent reveals their hand. You choose an instant or sorcery card from it or a card from their graveyard. Exile that card.

At the beginning of your upkeep, you may return a nontoken creature you control to its owner's hand. If you do, create a 2/2 green Elk creature token.

{4}{B}: Depthlight Beacon gets +1/+1 and gains lifelink until end of turn.
Cycling {2/B} ({2/B}, Discard this card: Draw a card.)

As Reflective Stalker enters, choose a noncreature card name.
When Reflective Stalker enters, if it was cast, create a token that's a copy of it.
Spells your opponents cast with the chosen name cost {2} more to cast.

Put target creature on top of its owner's library.
Agonize (You may cast this card from your graveyard by putting a -1/-1 counter on a creature you control in addition to paying its other costs. Then exile this card.)

Flying
When Inspirational Beacon enters, you gain 3 life.

Reach
{T}: Sadistic Sparkmage deals 1 damage to each opponent.

Whenever two or more creatures an opponent controls attack, adjudicate. (Create a white Aura enchantment token with enchant creature and “Sacrifice this token: Untap enchanted creature” attached to target creature.)
Enchanted creatures you control get +0/+2.

At the beginning of your upkeep, put a +1/+1 counter on Heyu, Immortal Hunter.
Whenever Heyu becomes the target of a spell or ability an opponent controls, counter it if Heyu has the greatest power among creatures on the battlefield.

Moonlight Stag has vigilance as long as it has a +1/+1 counter on it.

Wake of the Beast deals 2 damage divided as you choose among one or two targets.
Whenever a creature you control becomes monstrous, you may pay {R}. If you do, return Wake of the Beast from your graveyard to your hand.

{3}{U}: Tap target creature. Activate only as a sorcery.
Cycling {2/U} ({2/U}, Discard this card: Draw a card.)

{T}: Add {R} or {G}.
{T}, Sacrifice Sigil of Savagery: Add {R}{G}.