msem-instigator

When Ancient of the Glade enters, put a +1/+1 counter on each other creature you control.
{2}, Remove a +1/+1 counter from a creature you control: That creature gains indestructible until end of turn.

Lifelink
When Herald of Royalty enters, creatures you control get +1/+1 and gain vigilance until end of turn.

When Briarswine dies, create a 2/2 green Wolf creature token.
Foreshadow {4}{G} (You may cast this spell for its foreshadow cost. If you do, also trigger its “dies” abilities when it enters.)

Vampiric Vice deals 3 damage to target creature or planeswalker. Vampiric Vice also deals 2 damage to that permanent's controller if you control a Vampire.

Untap all nonland permanents you control.
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.)

Erratic (When this creature dies, reveal the top four cards of your library. Put a creature card that costs less than this revealed this way onto the battlefield and the rest on the bottom of your library in any order.)
Ifram's Greenfur must be blocked each combat if able.

Deathtouch
Whenever a creature dealt damage by Barbed Beast this turn dies, transform Barbed Beast.

Dictate of Rallios deals damage to any target equal to the number of Warriors you control.
Warriorcycling {2}{R} ({2}{R}, Discard this card: Search your library for a Warrior card, reveal it, and put it into your hand, then shuffle.)

Enchant creature
Embody (Enchanted creature is a copy of this card except for its types.)
Whenever Fate of the Brave becomes tapped, it deals 1 damage to each opponent.

Hexproof

Whenever you cast a noncreature spell, look at the top card of your library. You may put it into your graveyard.
{4}{U}: Draw a card.
At the beginning of your upkeep, if there are twenty-four or more noncreature cards in your graveyard, you win the game.

Cards can't leave graveyards.

Put target nonland permanent on the bottom of its owner's library. You gain life equal to the number of poison counters its owner has.

When Fang Den Headhunter enters, look at the top card of your library. If it's a creature card, you may reveal it and draw a card.

Flying

Reverberate—Sacrifice a Swamp. (When you cast this spell, copy it if you paid its reverberate cost.)
All creatures get -2/-2 until end of turn.

Target creature gets +2/+2 until end of turn.
Fabled {3}{G}{G} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that creature.)

{T}: Add one mana of any color. You can't spend this mana to cast spells with mana value 3 or greater.
Revive {2}{G} ({2}{G}, Exile this card from your graveyard: Create a token that's a copy of this card, except it has no mana cost. Activate this ability only any time you could cast a sorcery.)

When Strayseeker Ranger enters, search your library for a creature card with mana value 2 or less, reveal it, put it into your hand, then shuffle.
Recite {W}{W} (You may cast this creature from your graveyard for its recite cost. If you do, exile it when it enters or if it would leave the battlefield.)

As Battle the Evil One enters, choose Evil One or Rehison.
• Evil One — Zombie creature cards in your graveyard have unearth {3}{B}. ({3}{B}: Return this card from your graveyard to the battlefield. Exile it at the beginning of the end step or if it would leave the battlefield. Unearth only as a sorcery.)
• Rehison — Whenever an Elf you control enters, you may put a -1/-1 counter on target creature.

Shu Qin enters with your choice of a flying or +1/+1 counter on him.
At the beginning of your upkeep, choose a creature in Shu Qin's pack. He gains that creature's abilities until end of turn. (Two or more creatures you control with equal power are in a pack.)

Descended Marsh enters tapped.
{T}: Add {B} or {G}.
Morph {2} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Target creature you control gets +2/+1 until end of turn. It fights target creature you don't control. (Each deals damage to the other equal to its power.)

Flash (You may cast this spell any time you could cast an instant.)
When Volatimancer enters, you may have target creature have base power and toughness 1/1 until end of turn.

Put a +1/+1 counter on target creature you control if it's a Warrior. Then it fights up to one target creature you don't control.