msem-instigator

Destroy target creature with mana value X or less.

Enchant permanent
When Tempted by Lotuses enters the battlefield, enchanted permanent's owner creates three colorless artifact tokens named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”
You control enchanted permanent.

Enspirit (As you cast this spell, you may exile a nonenchantment creature you control until this leaves the battlefield or fails to resolve. Reduce this spell's cost by the exiled card's mana value.)
Tenacious Brawler enters the battlefield with X +1/+1 counters on it.

When Terror of the Ontarachie enters the battlefield, choose one —
• Each player sacrifices a creature.
• Each player loses 5 life.

{2}{R}: Thespian Soldier gains first strike until end of turn.

Creatures with power 4 or greater can't attack or block unless their controller pays {2} for each of those creatures.

Hexproof from enchantments (This creature can't be the target of enchantment spells or abilities your opponents control.)

Harmony — Creatures you control gain double strike until end of turn.
When Twirling Duet enters the battlefield, harmonize. (Trigger up to one harmony of one permanent you control.)

Enspirit (As you cast this spell, you may exile a nonenchantment creature you control until this leaves the battlefield or fails to resolve. Reduce this spell's cost by the exiled card's mana value.)
Deathtouch

When Undying Watcher enters the battlefield, germinate. (Put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)
Sacrifice another creature: Undying Watcher gains indestructible until end of turn.

{T}: Add one mana of any color.
{T}, Sacrifice Unicorn of the Vale: Add three mana of any one color.

All creatures get -X/-X until end of turn. X can't be 0.
Whenever a creature dies this turn, create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

Tithe (When this creature enters the battlefield, you may tap three other artifacts and/or creatures you control.)
When Vindictive Abbot enters the battlefield, you may have target creature get -1/-1 until end of turn. If Vindictive Abbot's tithe was paid, destroy that creature.

Draw X cards. Then if X is 2 or greater, you may discard any number of cards. For each card discarded this way, create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

Tithe (When this creature enters the battlefield, you may tap three other artifacts and/or creatures you control.)
When Wailing Chorus enters the battlefield, each opponent discards a card. If its tithe was paid, each opponent discards two cards instead.

Germinate three times. You lose 3 life. (To germinate, put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)

When Wild Festivities enters the battlefield or at the beginning of your upkeep, you may put a creature card from your hand onto the battlefield. If you do, each opponent creates a 1/1 blue Frog creature token.

Target creature you control gets +2/+2 until end of turn. It fights target creature an opponent controls.

Enspirit (As you cast this spell, you may exile a nonenchantment creature you control until this leaves the battlefield or fails to resolve. Reduce this spell's cost by the exiled card's mana value.)
You may have Witch of Shifting Waters enter the battlefield as a copy of any creature on the battlefield, except it's an enchantment in addition to its other types.

Flash
When Witch's Invocation enters the battlefield, draw a card.
You may cast spells as though they had flash.

When Woopip Bruiser enters the battlefield, germinate. When you do, you may have target non-Fungus creature get -X/-X until end of turn, where X is the greatest power among creatures you control. (To germinate, put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)

As an additional cost to cast this spell, sacrifice a creature.
Draw two cards. You gain 2 life.

When Woopip Elder enters the battlefield, germinate. (Put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)