msem-instigator

Creatures you control get +1/+1 until end of turn.
Showcase {2}{W}{W} (Then if you cast this for its showcase cost, create a 1/1 red Bard creature token that can't block and exile this. Whenever it attacks, you may cast a free copy of this.)

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
Put a prowess counter on target creature you control. That creature deals 2 damage to each opponent.
Scry 3.
Until end of turn, if you casting an instant or sorcery spell causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Whenever The Pursuit of Science enters or a nontoken creature you control dies, investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)
Clues you control have “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”

(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 — Creatures you control gain first strike until end of turn.
III — Creatures you control get +1/+0 until end of turn.

(Choose only one work as a sorcery to add its ability.)
When The Royal Vignettes enters, exile target instant or sorcery card from your graveyard. Until your next turn, you may cast that card.
{1}{U}: Ju, the Artisan
Whenever you cast an instant spell, draw a card, then discard a card.
{1}{R}: Lan, the Poet
Whenever you cast a sorcery spell, create a 1/1 red Bard creature token with “This creature can't block.”

When The Struggle for Death enters, choose target creature you don't control. Any number of creatures you control fight that creature.
Whenever a creature dies, look at the top card of your library. You may put it into your graveyard.

(Add a quest counter as this enters. Sacrifice after 3.)
At the beginning of your end step, if you cast two or more spells this turn, add a quest counter.
The Symphony of Leafdown deals 2 damage to any target. Draw a card.
Until the end of your next turn, instant and sorcery spells you cast cost {1} less to cast.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
Distribute a trample counter, a vigilance counter and a +1/+1 counter among one, two, or three creatures you control.
Choose another permanent you control. For each counter on it, you may move that counter onto a permanent you control.
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Search your library for two basic land cards that don't share a land type and put them onto the battlefield tapped.
{W}{U}{B}{R}{G}, Exile The World Follows After from your graveyard: Create a 4/4 Elemental creature token that's all colors. It can't block this turn.

Equipped creature gets +1/+0 and can't be blocked.
Equip Actor creature {1}
Equip {3}

Prowess
Whenever you cast a noncreature spell, audition for blue or for red. (Create a 1/1 Construct Actor creature token, a Wizard Role giving 2/2 and prowess, a Warlock Role giving 2/1 and flying, or a Warrior Role giving 3/2 and trample. Roles replace older ones.)

{T}: Draw a card. Activate only if Theoretical Scholar is embattled. (A creature is embattled if it has a counter on it or a permanent you control attached to it.)

Flying
Whenever Theurgic Flock deals combat damage to a player, if it doesn't have a +1/+1 counter on it, put a +1/+1 counter on it.

Target creature gets +1/+3 and gains hexproof until end of turn.

Choose two —
• Scry 3, then you may mill up to three cards.
• Each opponent loses 3 life.
• You draw a card and you lose 1 life.
• Return a creature card from your graveyard to your hand.

Equipped creature gets +2/+0 and has deathtouch.
Equip Rogue or Assassin {1}
Equip {3}

First strike
Other Foxes you control get +1/+1.
Whenever a Fox you control becomes blocked, it deals 1 damage to each creature blocking it.

Draw three cards. Then discard two cards unless you discard an instant or sorcery card.

{1}{B}: Target Knight or Soldier you control gains deathtouch until end of turn.

Trample
Stampede — Whenever Thoctar Yearling and a creature with greater power attack, put a +1/+1 counter on Thoctar Yearling.

Target player mills five cards. Draw a card for each card type among cards milled this way. (The card types are artifact, creature, enchantment, land, instant, planeswalker, sorcery, and tribal.)

When Thorn Tender enters, rouse 1, then put a +1/+1 counter on each creature you control. (Put a +1/+1 counter on a permanent you control. If it isn't a creature, tap it and it becomes a 0/0 creature in addition to its other types.)

Flash
Thorn-Touch Abomination enters with X +1/+1 counters on it.

Prismatic — Whenever you cast a multicolored spell, Thorny Bushwacker has base power and toughness 5/3 until end of turn.

(Choose only one work as a sorcery to add its ability.)
When Those Lost to the Waves enters, search your library for an artifact card with mana value 3 or less, reveal it, put it into your hand, then shuffle.
{1}{W}: Fight the Current
Equipped creatures you control get +1/+1.
{3}{U}: Soul of the Sea
At the beginning of combat on your turn, you may have target noncreature artifact become a 3/3 artifact creature until end of turn.