msem-instigator

This spell can't be countered.
Creatures you control have ward {2}. (Whenever one becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.)
When Natural Philosopher enters, you gain 2 life for each creature you control with power 4 or greater.

[+2]: Each player can cast only one more spell until your next turn.
[–3]: Exile all other permanents, then return them to the battlefield tapped under their owner's control. Creatures can't attack you or planeswalkers you control until your next turn.
[–8]: Return all permanent cards from your graveyard to the battlefield tapped.

Trample, haste
When Rejuvenating Elemental enters, remove up to X -1/-1 counters from among creatures you control. Rejuvenating Elemental gets +1/+1 until end of turn for each counter removed this way.

Flash
If a spell or ability would cause an opponent to create a token, instead you create that token and that player creates a 1/1 blue Fish creature token.

Voracious 2 (As this enters, you may sacrifice up to two artifacts and/or creatures. This creature enters with that many +1/+1 counters on it.)
When Territorial Bear dies, you may return up to two target artifact cards from your graveyard to your hand.

When this creature enters, you may put a -1/-1 counter on a creature you control. If you do, look at the top five cards of your library. You may reveal a land card from among them and put it into your hand. Put the rest into your graveyard.

Whenever another creature named Ainok Pack you control enters, you gain 2 life.

Triplicate Terror can't be blocked unless defending player pays {3}. (They pay it once each combat.)

Pride Ridge enters tapped.
{T}: Add {G} or {W}.
{2}{G}{W}: Until end of turn, Pride Ridge becomes a Cat creature with vigilance in addition to its other types.
Scavenge {2}{G}{W}

At the beginning of combat on your turn, target creature you control gains vigilance until end of turn. That creature can't be blocked this turn.

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.”)

Trample
At the beginning of your upkeep, return another creature you control to its owner's hand.

Flying, haste
Whenever Fang, the Lavaclasm enters or attacks, it deals 2 damage to each other creature.

Whenever you cast a spell from your graveyard, you may sacrifice a creature. If you do, copy that spell. You may choose new targets for the copy.

Reach (This creature can block creatures with flying.)
When Spider Broodmother dies, create two 1/2 green Spider creature tokens with reach. (This creature can block creatures with flying.)

{T}, Sacrifice Adaptive Terrains: Search your library for a basic land card and put it onto the battlefield tapped, then shuffle.

When Crystalline Golem enters, choose a color. You gain 1 life for each permanent of that color you control.

[+1]: Create a 1/1 blue Dragon creature token with flying and “This creature can't attack unless you control a nontoken Dragon.”
[–2]: Flynn deals damage to target creature or planeswalker equal to the total power of Dragons you control.
[–5]: You get an emblem with “Dragon spells you cast cost {U}{R} less to cast and have flash.”

({T}: Add {B} or {G}.)
As Ruptured Morass enters, you may pay {1}. If you don't, Ruptured Morass enters tapped.

When target creature dies this turn, return it to the battlefield under its owner's control. When you do, germinate. (Put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)

Flying
Crew 2 (Tap any number of creatures you control with total power 2 or greater: This Vehicle becomes an artifact creature until end of turn.)

Exile target creature you control, then each other player may exile a creature they control. Each player who exiled a creature this way reveals cards from the top of their library until they reveal a creature card with mana value different from the creature they exiled, puts that card onto the battlefield, then shuffles.

Target creature you control gets +1/+1 and gains indestructible until end of turn.
Fabled {3}{W}{W} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that creature.)

Equipped creature is a Dragon and has base power and toughness 4/4, flying, and “{2}: This creature gets +1/+0 until end of turn.”
Equip {3}