msem-instigator

When Chaotic Pupil enters, harmonize twice. (To harmonize, trigger up to one harmony of a permanent you control.)
Harmony — Draw a card, then discard a card.

When Reclamation Sage enters, you may destroy target artifact or enchantment.

Surveil 2. When you do, destroy up to one target creature with power less than or equal to the number of card types among cards in your graveyard.

Cast this spell only during your turn.
Draw a card. Then if an opponent cast a spell this turn, scry 1 and draw an additional card.

Tribute 1 (As this creature enters, an opponent of your choice may put a +1/+1 counter on it.)
When Giant Dromad enters, if tribute wasn't paid, you may destroy target artifact or enchantment.

Lair Recluse enters with a vigilance counter and a reach counter on it.
At the beginning of your upkeep, permutate. (You may remove a counter from a creature you control. If you do, put two +1/+1 counters on a different creature you control.)

{X}, {T}: Target player mills X cards.

[+1]: Whenever a creature you control attacks this turn, Aleryn, Dungeon Disabler deals 1 damage to the defending player.
[–1]: Add X mana in any combination of {R} and/or {G}, where X is the number of creatures you control.
[–6]: You get an emblem with “Whenever a player casts a spell, this emblem deals 3 damage to any target.”

This spell has flash as long as you control a Soldier.
When Tinyvale Watchkeep enters, untap target creature.

Reflections you control get +2/+2 until end of turn. Other creatures you control get +1/+1 until end of turn.

Burning Grasp deals 3 damage divided as you choose among one or two targets.
Draw a card.

Archive 6 (As this enters, shuffle the top six cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
Whenever a creature or planeswalker you control dies, you may play a card from the archived library. (You still pay its costs.)

When Final Form enters, your life total becomes 20.
At the beginning of your upkeep, destroy up to one target creature. You draw X cards and you lose X life, where X is its power.

Target creature can't be blocked this turn.
Compose (Then if you cast this from your hand, exile it and create a Saga token with “r3—You may cast a copy of this card from exile without paying its mana cost.”)

At the beginning of each end step, if a creature left the battlefield this turn, you get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)
{2}{W}{U}: When target creature dies this turn, return that card to its owner's hand.

Whenever you cast an enchantment spell, reveal the top card of your library. If it's an enchantment card, you may put it onto the battlefield.

Alpha (You may have this creature enter with a +1/+1 counter on it. If you do, it becomes alpha and can only attack alone.)
Lifelink

Other Merfolk you control get +1/+1.
When Olantin Pearlreader enters, scry 2. Then draw a card if you control two or more other Merfolk.

Vigilance
Whenever another creature you control attacks, put a +1/+1 counter on it if it has less than 4 power. Otherwise, it gains first strike and trample until end of turn.

Look at the top two cards of your library. Put one of them into your hand, then you may have any number of players each mill three cards.

Trample
Whenever a player casts a spell, Cinderhoof Minotaur deals 1 damage to that player.
Whenever Cinderhoof Minotaur attacks, add {R}. Until end of turn, you don't lose this mana as steps and phases end.

Wither (This deals damage to creatures in the form of -1/-1 counters.)
When Abyssal Familiar dies, it deals 1 damage to you and to any target.

Exile target nonland permanent.

Survivors you control have haste.

Target creature you control gets +1/+0 until end of turn. It fights target creature you don't control.