msem-instigator

Flying
Erratic (When this creature dies, reveal the top four cards of your library. Put a creature card that costs less than this revealed this way onto the battlefield and the rest on the bottom of your library in any order.)
Whenever Zaidha, Seraph of Calamity deals combat damage to a player, choose up to two target nonland permanents that player controls and target nonland permanent you control. Destroy one of those permanents at random.

Ophan Titan gets +3/+3 as long as there are no nonland cards in your graveyard.
Morph {1}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Trample
Morph {3}{G}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
When you turn Spearhead Ophan face up, creatures you control get +2/+2 and gain trample until end of turn.

Flying
Whenever Hand of Genesis deals combat damage to a player, manifest the bottom card of your library. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)

Flying
Morph {3}{W}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
When Wings of Reckoning is turned face up, target tapped creature gets -2/-2 until end of turn.

This spell costs {2} less to cast for each face-down creature you control.
Flying

Flash
Defender, flying

{1}{R}, {T}, Sacrifice an artifact: Elise, Maktali Prodigy deals 2 damage to any target.
{1}{U}, {T}, Sacrifice an artifact: Return target nonland permanent to its owner's hand.
{3}{U}{R}, {T}, Sacrifice three artifacts: Discard your hand, then draw seven cards.

[+2]: Create a Vial token. (It's an artifact with “1, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)
[–3]: Sacrifice another nonland permanent. If you do, destroy target nonland permanent.
[–9]: You get an emblem with “At the beginning of your end step, create Fallen One, a legendary 6/6 black Faerie Angel Avatar creature token with flying.”

Prowess
Whenever you cast your first instant or sorcery spell from your hand during each of your turns, if it doesn't have compose, it gains 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.”)

Changeling (This card is every creature type.)
As Kalyn, Wildkin Envoy enters, choose up to three non-Human creature types.
Other creatures you control with one or more of the chosen types get +1/+1.
{2}, {T}: Create a 1/1 colorless Shapeshifter creature token with changeling. Activate only outside of combat.

Flash
You may activate Zero's loyalty abilities any time you could cast an instant on your turn and the turn they entered.
[+2]: Destroy up to one target permanent with mana value 4 or greater.
[–2]: You may cast a spell with mana value 5 or less from your hand without paying its mana cost.
[–3]: Search your library for a card and put it into your hand. Shuffle your library.

When Goldengrain Alseid enters, you may search your library for a basic Plains card, reveal it, put it into your hand, then shuffle.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
You may exile target nonland permanent. If you do, you lose 3 life.
Create a 7/7 white, black, and green Horror Knight creature token with trample and “Whenever this creature is dealt damage, you lose that much life.”

Once each turn, when you activate a nonmana ability, you may create a tapped 1/1 white Spirit creature token with flying.
{4}{W}{U}: You gain 1 life and draw a card.

Target creature gets -4/-4 until end of turn.
Civilized — Draw a card if you control an artifact, a creature, and an enchantment.

Destroy target creature or planeswalker. That permanent's controller loses 3 life unless that player sacrifices a nonland permanent or discards a card.

When Here Forever enters, exile target creature or planeswalker until Here Forever leaves the battlefield.
At the beginning of your upkeep, the owner of the exiled card loses 1 life.

Primal {5}{G}{U} (During your turn, you may cast this spell for {5}{G}{U} instead of playing a land.)
If you cast this spell for its primal cost, search your library for a permanent card, reveal it, put it into your hand, then shuffle.
You may put a permanent card from your hand onto the battlefield.

Each player discards their hand, then draws cards equal to the greatest number of cards discarded this way.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
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.)
Whenever a creature you control deals damage to an opponent this turn, exile the top card of your library. You may play it this turn.

Take an extra turn after this one. At the beginning of that turn's end step, sacrifice each land you control. Whenever you cast a spell during that turn, copy it. You may choose new targets for the copy.
Exile Futuretheft.

When Dawn Silhouette enters, you may exile target creature not named Dawn Silhouette you control, then return that card to the battlefield under your control.
Mirage {1}{W} (You may cast this spell as though it had flash for its mirage cost. If you do, sacrifice it at the beginning of the next cleanup step.)

Flash
When Agent of Deception enters, counter target creature or planeswalker spell unless its controller pays {X}, where X is your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)

Destroy target land. Its controller creates a colorless Desert land token with “{T}: Add {C}.”