msem-instigator

Whenever you create one or more creature tokens, you may pay {1}{G/W}. If you do, put a +1/+1 counter on Sylshal, Life's Gyre and on each creature token you control.

When Symbiotic Sprout dies, create two 1/1 green Saproling creature tokens.

Synchronous Battle Armor and equipped creature get +1/+1 for each artifact you control.
Whenever equipped creature attacks, tap up to three target creatures.
Reconfigure {3}{U}{U} ({3}{U}{U}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

When Syncretic Master enters, look at the top X cards of your library, where X is the number of basic land types among lands you control. Put one them into your hand and the rest into your graveyard.

Enchant creature
When Synergistic Curiosity enters, create a 2/2 blue Rogue creature token.
Enchanted creature gets +1/+1 and can't be blocked by creatures with flying.

Look at target player's hand. Draw two cards, then discard a card.

Enchant creature
When Sythian Scripture enters, put two +1/+1 counters on enchanted creature.
Enchanted creature gets +1/+1 and has indestructible and lifelink if you controlled a white legendary creature or planeswalker as you cast Sythian Scripture.

Syurrai Traitor gets +1/+1 as long as you control a Plains.
{3}{W}: Create a 1/1 white Soldier creature token.

During each of your turns, you may cast a copy of a card in an opponent's graveyard by exiling that card in addition to its other costs. (Copies of permanents enter as tokens.)

Whenever one or more creatures you control attack, create a 1/1 white Soldier creature token that's tapped and attacking.
{3}{W}: Creatures you control get +1/+1 until end of turn.

Haste
Whenever Tailor of Terror attacks, you may exile a creature card from your graveyard. If you do, put a +1/+1 counter on Tailor of Terror.

If an opponent would gain life, that player loses that much life instead.

Flash
First strike
If you cast Taiyohata Champion during your declare attackers step, it enters tapped and attacking.

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

Destroy target nonland permanent. If it had flying, put a flying counter on a creature you control. Do the same for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

Enchant creature
You control enchanted creature.
At the beginning of your upkeep, enchanted creature's owner may have you draw three cards. If they do, sacrifice Take For Ransom.

Basic lands you control have all basic land types.
Augmented — Whenever you cast an instant or sorcery spell, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, copy it. You may choose new targets for the copy.

When Taken Away enters, target opponent reveals their hand. You choose a nonland card from it and exile that card until Taken Away leaves the battlefield. You may cast that card for as long as it remains exiled, and you may spend mana as though it were mana of any type to cast that spell.

Until end of turn, noncreature lands you control become 3/3 Elemental creatures with haste and trample.
Orchestrate {1}{G} (You may exile this card from your hand anytime you could cast a sorcery for its orchestrate cost. When you next resolve a spell, you may cast this from exile without paying its mana cost.)

Whenever Talent Scout enters or dies, return target creature card with mana value 2 or less from your graveyard to your hand.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II — Create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)
III — For each color, return up to one target creature card of that color from your graveyard to your hand.
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Draw two cards.

Bleed—{B}, Pay 2 life. (You may cast this spell for its bleed cost if an opponent has lost life this turn.)
Draw two cards, then discard a card.

Reach, trample
Tallowkeep enters with two wax counters on it.
Whenever Tallowkeep attacks, remove a wax counter from it. Then if Tallowkeep has no wax counters on it, sacrifice it.
Whenever another artifact you control enters, put a wax counter on Tallowkeep.

[+1]: Scry 1. Untap up to one target creature.
[–2]: Mill a card for each card type among permanents you control, then you may return a land card and/or a nonland card milled this way to their owner's hand.
[–6]: Until end of turn, you may cast spells from your hand and graveyard without paying their mana costs. If a card would be put into your graveyard from anywhere this turn, exile it instead.