msem-instigator

Flash
When this enchantment enters, if you cast it, you may return target spell or nonland permanent to its owner's hand.
Whenever you cast your first spell during each opponent's turn, create a 1/1 white and blue Bird creature token with flying.

Whenever a creature you control enters, you gain 1 life.
{2}{U}: Return target creature you control to its owner's hand.

Flying
{1}{W/U}{W/U}: Creatures you control gain flying until end of turn if another creature you control has flying. The same is true for first strike, double strike, deathtouch, haste, indestructible, lifelink, menace, reach, trample, and vigilance.

At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. If that creature has flying, transform Mounting Up.

Return target nonland permanent to its owner's hand.
Exile target nonland permanent you control, then return it to the battlefield under your control.

[+1]: Until end of turn, up to one target creature gets +1/+0 and can't be blocked.
[–2]: Exile target artifact or enchantment.
[–5]: You get an emblem with “Untap all permanents you control during each other players untap step” and “Draw a card during each other player's draw step.”

Archive 3 (As this enters, shuffle the top three cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
Whenever you draw a card from the archived library, target creature you control can't be blocked this turn.

Exile target permanent, then return it to the battlefield under its owner's control. If that permanent was an attacking creature, you may have it enter tapped and attacking.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
Concord — Once each turn, when an opponent casts a spell or activates an ability that targets a Merfolk or enchantment you control, you may counter that spell or ability if there are four or more card types among permanents you control.

At the beginning of your upkeep, scry 1, then you gain 1 life.

Put a porcelain counter on each of up to one target creature and up to one target artifact. They become 3/3 colorless artifact creatures and lose all abilities.

Exile up to one target creature you control until your next end step. (Then exile this card. You may play the land later from exile.)

When Persecution Official enters, choose a creature card name.
Cards with the chosen name can't be cast.

Create three 1/1 white Spirit creature tokens with flying.

Whenever Pilgrim of Xifang's Climb blocks a creature, that creature doesn't untap during its controller's next untap step.

({T}: Add {W} or {U}.)
Pool of Light enters tapped unless you control a basic Plains or a basic Island.

As Port Town enters, you may reveal a Plains or Island card from your hand. If you don't, Port Town enters tapped.
{T}: Add {W} or {U}.

(Activate each submodule once as a sorcery. When this enters, activate one submodule for free.)
Flash
{2}{W}: Prioritize
Put two +1/+1 counters on target tapped creature.
{2}{U}: Precipitate
Look at the top six cards of your library. Exile one face down, then shuffle. For as long as that card is exiled, you may cast it if it's an instant or has flash.
{1}{W}{U}: Process
Precognition Module gains “Whenever you cast another spell with flash or an instant, surveil 2.”

Pristine Delta enters tapped.
{T}: Add {W} or {U}.
{2}{W}{U}, {T}, Sacrifice Pristine Delta: Draw a card.

Private Library enters tapped.
When Private Library enters, look at the top card of your library. You may put it into your graveyard.
{T}: Add {W} or {U}.

Flash
Flying
When Protector of the City enters, choose target nonland permanent. Counter all activated abilities from that source and it can't attack, block, or activate abilities until Protector of the City leaves the battlefield.

Target player can't cast spells this turn.
Fabled {2}{W}{U} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that player.)

Whenever you cast an instant or sorcery spell, detain target creature an opponent controls. (Until your next turn, that creature can't attack or block and its activated abilities can't be activated.)

Spells your opponents cast this turn cost {1} more to cast. (Then exile this card. You may cast the creature later from exile.)

Radiant Vistas enters tapped.
{T}: Add {W} or {U}.
{W}{U}, {T}, Sacrifice Radiant Vistas: Conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)