Lavinia of the Tenth

Protection from red
When Lavinia enters, detain each nonland permanent your opponents control with mana value 4 or less. (Until your next turn, those permanents can't attack or block and their activated abilities can't be activated.)

Windreaver

Flying
{W}: This creature gains vigilance until end of turn.
{W}: This creature gets +0/+1 until end of turn.
{U}: Switch this creature's power and toughness until end of turn.
{U}: Return this creature to its owner's hand.

Azorius Signet

Spirit of the Spires

Flying
Other creatures you control with flying get +0/+1.

Azorius Justiciar

When this creature enters, detain up to two target creatures your opponents control. (Until your next turn, those creatures can't attack or block and their activated abilities can't be activated.)

Pride of the Clouds

Flying
This creature gets +1/+1 for each other creature on the battlefield with flying.
Forecast — {2}{W}{U}, Reveal this creature from your hand: Create a 1/1 white and blue Bird creature token with flying. (Activate only during your upkeep and only once each turn.)

Sphinx of Foresight

You may reveal this card from your opening hand. If you do, scry 3 at the beginning of your first upkeep.
Flying
At the beginning of your upkeep, scry 1.

Warden

Create a 4/4 white and blue Sphinx creature token with flying and vigilance.

Warrant

Put target attacking or blocking creature on top of its owner's library.

Warrant // Warden

Azorius Guildgate

This land enters tapped.
{T}: Add {W} or {U}.

Dovescape

({W/U} can be paid with either {W} or {U}.)
Whenever a player casts a noncreature spell, counter that spell. That player creates X 1/1 white and blue Bird creature tokens with flying, where X is the spell's mana value.

Dramatic Rescue

Return target creature to its owner's hand. You gain 2 life.

Island

Stoic Ephemera

Defender (This creature can't attack.)
Flying
When this creature blocks, sacrifice it at end of combat.

Windstorm Drake

Flying
Other creatures you control with flying get +1/+0.

Sky Tether

Enchant creature
Enchanted creature has defender and loses flying.

Sky Hussar

Flying
When this creature enters, untap all creatures you control.
Forecast — Tap two untapped white and/or blue creatures you control, Reveal this card from your hand: Draw a card. (Activate only during your upkeep and only once each turn.)

Plains

Render Silent

Counter target spell. Its controller can't cast spells this turn.

Azorius Herald

This creature can't be blocked.
When this creature enters, you gain 4 life.
When this creature enters, sacrifice it unless {U} was spent to cast it.

Azorius Keyrune

{T}: Add {W} or {U}.
{W}{U}: This artifact becomes a 2/2 white and blue Bird artifact creature with flying until end of turn.

Azorius Guildmage

{2}{W}: Tap target creature.
{2}{U}: Counter target activated ability. (Mana abilities can't be targeted.)

Judge's Familiar

Flying
Sacrifice this creature: Counter target instant or sorcery spell unless its controller pays {1}.

Lyev Skyknight

Flying
When this creature enters, detain target nonland permanent an opponent controls. (Until your next turn, that permanent can't attack or block and its activated abilities can't be activated.)

Unbreakable Formation

Creatures you control gain indestructible until end of turn.
Addendum — If you cast this spell during your main phase, put a +1/+1 counter on each of those creatures and they gain vigilance until end of turn.

Isperia the Inscrutable

Flying
Whenever Isperia deals combat damage to a player, choose a card name. That player reveals their hand. If a card with the chosen name is revealed this way, search your library for a creature card with flying, reveal it, put it into your hand, then shuffle.

Sphinx's Revelation

Sphinx of New Prahv

Flying, vigilance
Spells your opponents cast that target this creature cost {2} more to cast.

Court Hussar

Vigilance
When this creature enters, look at the top three cards of your library, then put one of them into your hand and the rest on the bottom of your library in any order.
When this creature enters, sacrifice it unless {W} was spent to cast it.

Hover Barrier

Isperia, Supreme Judge

Flying
Whenever a creature attacks you or a planeswalker you control, you may draw a card.

Azorius Charm

Choose one —
• Creatures you control gain lifelink until end of turn.
• Draw a card.
• Put target attacking or blocking creature on top of its owner's library.

Deploy

Create two 1/1 colorless Thopter artifact creature tokens with flying, then you gain 1 life for each creature you control.

Depose

Depose // Deploy

Summary Judgment

Summary Judgment deals 3 damage to target tapped creature.
Addendum — If you cast this spell during your main phase, it deals 5 damage instead.

Skymark Roc

Flying
Whenever this creature attacks, you may return target creature defending player controls with toughness 2 or less to its owner's hand.

Detention Sphere

When this enchantment enters, you may exile target nonland permanent not named Detention Sphere and all other permanents with the same name as that permanent.
When this enchantment leaves the battlefield, return the exiled cards to the battlefield under their owner's control.

Archon of the Triumvirate

Flying
Whenever this creature attacks, detain up to two target nonland permanents your opponents control. (Until your next turn, those permanents can't attack or block and their activated abilities can't be activated.)

Azorius Chancery

This land enters tapped.
When this land enters, return a land you control to its owner's hand.
{T}: Add {W}{U}.

Sphinx's Insight

Draw two cards.
Addendum — If you cast this spell during your main phase, you gain 2 life.