msem-instigator

Flying
When Demon of Endless Hunger enters, choose one —
• Mill two cards.
• Exile up to two target cards from graveyards.

Whenever an opponent draws a card, you may draw a card.

At the beginning of each end step, if you've cast a noncreature spell this turn, Void Sculptor deals 1 damage to each opponent.

Equipped creature has “Whenever this creature attacks, untap each other creature you control.”
Equip {3}

When Bird Call enters, search your library for a creature card, reveal it, shuffle, then put that card on top.
{2}, {T}: Target creature gets +1/+1 until end of turn.

(Transform this if it's not attached to a creature. Pay {B} as a sorcery to unattach it.)
Enchant creature you control
Herald of Death's rider gets +1/+1.
Sacrifice a creature: Herald of Death's rider gets +2/+2 until end of turn.

Enchant creature
Enchanted creature gets +2/+2 and has lifelink.

At the beginning of combat on your turn, you may sacrifice a creature. If you do, creatures you control get +2/+1 until end of turn.

When Relentless Pathcutter enters, create a green Aura enchantment token named Enmity attached to target creature. The token has enchant creature and “Enchanted creature gets +2/+0 and has trample.”
When Relentless Pathcutter dies, return it to its owner's hand.

Target creature gets +2/+2 until end of turn. Untap it.

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.

Whenever Knowledge Extractor deals combat damage to a player, draw a card.

Menace
Pay 2 life: Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)
Sacrifice a permanent: Darna gets +1/+1 until end of turn.

{T}: Add {C}.
{T}, Exile two cards from your graveyard: Add {B} or {G}.

Haste
Whenever a nonbasic land becomes untapped, its controller loses 1 life.

Vigilance, trample
Whenever you draw your second card each turn, put a +1/+1 counter on Coralblade Cohort.
Cycling {G} ({G}, Discard this card: Draw a card.)

Counter target spell unless its controller pays {1}.

When Gulch Glutton enters, create a 1/1 black Rat creature token.
Whenever Gulch Glutton perseveres, each player sacrifices a creature. (A creature perseveres when it survives damage.)

When Pious Flutist enters, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

(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 Avaz Rising enters, return target creature card from your graveyard to the battlefield. That creature becomes an Army in addition to its other types.

At the beginning of combat on your turn, target creature you control explores three times. It attacks this combat if able and other creatures you control can't attack this combat. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on that creature, then put the card back or put it into your graveyard.)

Spend only black mana on X.
Up to two target creatures each get -X/-X until end of turn. You gain X life.

As Duke Gerard Hoff enters, an opponent gains control of it.
Duke Gerard Hoff can't attack its owner or planeswalkers that player controls.
Creatures your opponents control get +2/+1.

Trample, vigilance
Spells your opponents cast that target Xiejuan and Hao Lu cost {X} more to cast, where X is the number of other creatures you control.
Whenever another creature you control dies, draw a card.

As Mercantile Accords enters, choose a number.
Whenever an opponent casts a spell with the chosen mana value, you draw a card and create a Treasure token.