msem-instigator

Whenever Sower of Virulent Thoughts attacks, you may return a creature you control to its owner's hand. If you do, put a +1/+1 counter on target creature you control.

Spawn of Andazir enters with X +1/+1
counters on it.
Lionize {2}{G} ({2}{G}, Exile this card from your hand:
Put a +1/+1 counter on target creature and it gains the following ability until end of turn. You may cast this card on a later turn from exile.)
Whenever this creature deals damage to a player or noncreature permanent, double the number of +1/+1
counters on it.

Flying, haste
Whenever Spawn of Hadak attacks, draw a card, then discard a card.

When you cast this spell, create a token that's a copy of it.
Equipped creature gets +2/+2.
Equip {2}

When Spoiled Prince enters, each player sacrifices a creature with the greatest power among creatures they control.

Whenever a permanent you control leaves the battlefield, if it had counters on it, you may put those counters on Stage Magician.
At the beginning of your end step, you may move any number of counters from Stage Magician onto target permanent you control.

Prevent all combat damage that would be dealt this turn by non-Army creatures.
Amass Soldiers 2. (Put two +1/+1 counters on an Army you control. It's also a Soldier. If you don't control one, create an 0/0 black Soldier Army creature token first.)

Create a 3/3 black Demon Horror creature token.
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.”)

Enchant creature
When Sting of the Manticore enters, scry 2.
Enchanted creature gets +1/+0 and has deathtouch.

Whenever you gain life, each opponent loses 1 life.

Stoic Djinn has flying as long as it has a counter on it.

When Stolen Light enters, exile target nonland permanent an opponent controls until Stolen Light leaves the battlefield.
{W}{U}{B}{R}{G}: Put a permanent card exiled with Stolen Light onto the battlefield under your control. It's a 3/3 Horror creature in addition to its other types.

Whenever another creature you control enters, put your choice of a +1/+1 counter, a trample counter, or a haste counter on it.

At the beginning of each end step, if you've cast a noncreature spell this turn, put a +1/+1 counter on Streetwise Spellseeker. Then if its power is 5 or greater, create a 4/4 white Angel Soldier creature token with flying.

Choose one or both —
• Audition for green. (Create a 1/1 Construct Actor creature token, a Scout Role giving 2/3 and vigilance, or a Warrior Role giving 3/2 and trample. Roles replace older ones.)
• Target creature you control fights target creature you don't control.

You may have Strikebreaker enter as a copy of a non-Aura enchantment you control, except it's a 2/2 Construct Actor creature in addition to its types.

Reveal the top four cards of your library. You may put one into your hand and the rest into your graveyard.
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.”)

Flying
Whenever you honor a creature, create two 1/1 white Soldier creature tokens.
Whenever you condemn a creature, each opponent loses life equal to its power and you gain life equal to its toughness.

You may sacrifice three Treasures rather than pay this spell's mana cost.
Flying, trample, haste

Flash
When Surreal Bakhtak enters, choose one —
• Destroy target tapped creature.
• Tap up to three target creatures.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Create two 1/1 colorless Construct Actor creature tokens.
II, III — Creatures you control gain flying until end of turn. Whenever one or more of them deals combat damage to a player this turn, draw a card.
​

When Swiftwheel Slayers enters, audition for red. (Create a 1/1 Construct Actor creature token, a Warrior Role giving 3/2 and trample, or a Wizard Role giving 2/2 and prowess. Roles replace older ones.)
Token creatures you control have haste.

Counter target spell. Create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

This spell can't be countered.
Flying, menace, haste
Ward—Sacrifice a creature. (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player sacrifices a creature.)