msem-instigator

Whenever Playful Surveyor attacks, reveal the top card of your library. If that card shares a color with a permanent you control, you gain 2 life.

{T}: Add {C}.
Satrapies you control have “{1}{B}, {T}: Each opponent loses 1 life and you gain 1 life.”

Foretell {B}{R} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)
Haste
Whenever Sofia deals combat damage to an opponent, exile the top card of that player's library face down and look at it. You may play 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. Then foretell Sofia. It costs {0} to foretell this way.

Whenever you cast a spell from your graveyard, you may sacrifice a creature. If you do, copy that spell. You may choose new targets for the copy.

Flying
When Unraveller of Mysteries enters, mill two cards.

Menace
Other attacking Hounds you control get +2/+0.

Enchant creature
Enchanted creature gets +3/+0 and has first strike.

{T}, Sacrifice Renewal Grove: Search your library for a basic land card, put it onto the battlefield, then shuffle. If Renewal Grove entered since your last upkeep, that land doesn't untap during your next untap step.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
Cycling {U} ({U}, Discard this card: Draw a card.)

Return target nonland permanent you control and target nonland permanent you don't control to their owners' hands.

When Ophidian Oracle enters, draw a card, then abound. (To abound, you may cast a spell that costs less than this from your hand without paying its mana cost.)
Recite {2}{G}{G} (You may cast this creature from your graveyard for its recite cost. If you do, exile it when it enters or if it would leave the battlefield.)

Whenever one or more cards are put into your graveyard from your library, exile one of those cards.
Whenever Colossal Hermit deals combat damage to a player, you may cast a card exiled with it without paying its mana cost.

Hexproof
As long as an opponent controls a permanent you own, Vault Sentinel gets +4/+4.

Landfall — Whenever a land you control enters, you may pay {1}{G}. If you do, create a 2/2 green Wolf creature token.

{T}: Scry 1.

{B}{G}, {T}: Reveal the bottom card of your library and exile it. Target creature gets +X/-X until end of turn, where X is that card's mana value.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Exile target nonland permanent you don't control until Waltz on a Nimbus leaves the battlefield.
II — Create a 1/1 white Soldier creature token with “This creature gets +1/+1 for each enchantment you control.”
III — Search your library for a non-Saga enchantment card and reveal it. You may cast that card. Then shuffle.

Menace, lifelink
Whenever a creature enters under an opponent's control, you may have that player lose 1 life.

Frontline Banneret has first strike as long as it's your turn.
When Frontline Banneret enters, put a +1/+1 counter on another target Knight or Soldier you control.

Protection from sorceries
Whenever Magdel, Caller of Souls attacks, create a 1/1 white Spirit creature token with flying that's tapped and attacking for each storied permanent you control. Exile the tokens at end of combat. (Enchantments and legendary permanents are storied.)

You gain 3 life and you mill three cards.
Coalesce {5}{G} (You may cast this from your graveyard for {5}{G}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)

Whenever Path Lighter deals combat damage to a player, it explores. (Reveal the top card of your library. Put it into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then you may put that card in your graveyard.)

Target player reveals their hand. You choose a nonland card from it. That player discards that card.(Cast a copy of this spell once while this creature is on the battlefield.)

Target creature gets +X/+X until end of turn.
Fabled {X}{R}{R} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that creature.)

Reach
{T}: Sadistic Sparkmage deals 1 damage to each opponent.