msem-instigator

You may cast spells as though they had flash.

Flying
When Spectre of Terror deals combat damage to a player, that player discards a card.
Madness {1}{B} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Foretell {X}{B} (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.)
Target creature gets -X/-X until end of turn. If this spell was foretold, you gain X life.

(Activate each submodule once as a sorcery. When this enters, activate one submodule for free.)
{3}{R}: Rage
The first instant or sorcery spell you cast during your next turn costs {3} less to cast.
{3}{G}: Rampage
The first permanent spell you cast during your next turn costs {3} less to cast.
{2}{R}{G}: Ruin
Fury Module gains “Whenever you cast a spell with mana value 5 or greater, you may draw a card.”

Prowess
{U}: Sage of the Aurora gains flying until end of turn.

Defender
As long as you control an enchantment, Rooted Cavalier has vigilance and can attack as though it didn't have defender.

Sacrifice another creature: Put a +1/+1 counter on Skieryg Menace.

{1}{W}: Exile Furtive Witch. If you do, exile another target nonland permanent. Return both of those cards to the battlefield at the beginning of the next end step under their owners' control.

Other creatures you control get +2/+0 and have menace.
Whenever another creature you control dies, if it wasn't sacrificed, sacrifice a creature.

{2/G}, {T}: Put a +1/+1 counter on target creature you control.

({T}: Add {B} or {G}.)
Shuddering Node enters tapped.
{1}, {T}: Add {B}{B} or {G}{G}.

When Lunar Defractor enters, each player discards a card.
Revive {5}{B}{B} ({5}{B}{B}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

{3}, {T}: Return target creature card from your graveyard to the battlefield under target player's control. That creature deals damage equal to its power to that player.

Colossal 3—{4}{R}{G} (You may cast this for its colossal cost to have it enter with three +1/+1 counters; or pay {4}{R}{G} as a sorcery: Put three +1/+1 counters on it if it has none.)
Each creature you control with a counter on it can't be blocked by more than one creature.

When Ruins' Reward enters, draw a card, then discard a card.
{T}: Add one mana of any color.

When Machi's Assistants enters or you gain life, you may mill four cards. When you do, you may return a permanent card from your graveyard to your hand. This ability triggers no more than four times each turn.

Whenever another creature or enchantment you control enters, you gain 1 life.
{3}{W}{W}, Pay 5 life: Castigated Sister becomes a 5/5 Angel Horror with flying. (This effect doesn't end at end of turn.)

Destroy target noncreature permanent.
Recruit. (Create a 0/0 white Soldier Army creature token, then put a +1/+1 counter on each Army you control.)

Reach
When Colonial Effigy dies, create a 1/1 white Spirit creature token with flying.

{T}, Sacrifice another creature: Return target creature card with mana value equal to 1 plus the sacrificed creature's mana value from your graveyard to the battlefield. Activate only as a sorcery.

Whenever a creature you control enters, it gets +2/+1 until end of turn.

Parasol Twirler has flying as long as you control an artifact.

Up to one target creature gets -2/-2 until end of turn. Put a +1/+1 counter on up to one target creature you control.

Settlement Scout can't be blocked if you control an attacking creature with greater power than it.
Revive {3}{R} ({3}{R}, Exile this card from your graveyard: Create a token that's a copy of this card, except it has no mana cost. Activate this ability only any time you could cast a sorcery.)

When Humble Shepherd enters, create a 0/1 white Sheep creature token.
{T}, Tap an untapped Sheep you control: Add one mana of any color.