For each attacking creature, its owner puts it on the top or bottom of their library.

Flying

Inspired -- Whenever Arbiter of the Ideal becomes untapped, reveal the top card of your library. If it's an artifact, creature, or land card, you may put it onto the battlefield with a manifestation counter on it. That permanent is an enchantment in addition to its other types.

Arcane Sanctum enters the battlefield tapped.

{T}: Add {W}, {U}, or {B}.

{T}: Add one mana of any color in your commander's color identity.

Flying

When Arcanist's Owl enters the battlefield, look at the top four cards of your library. You may reveal an artifact or enchantment card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Flying

Whenever you cast a historic spell, scry 1. (Artifacts, legendaries, and Sagas are historic. To scry 1, look at the top card of your library, then you may put that card on the bottom of your library.)

Flying

{2}{U}, {T}: Draw two cards, then discard a card.

Whenever Atemsis, All-Seeing deals damage to an opponent, you may reveal your hand. If cards with at least six different mana values are revealed this way, that player loses the game.

Azorius Guildgate enters the battlefield tapped.

{T}: Add {W} or {U}.

{1}, {T}: Add {W}{U}.

Flying, deathtouch

When Baleful Strix enters the battlefield, draw a card.

Scry 2, then draw two cards.

Foretell {1}{U} (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.)

Draw three cards, then put two cards from your hand on top of your library in any order.

Lands you control have "{T}: Add one mana of any color."

{T}: Add one mana of any color.

{T}: Add one mana of any color in your commander's color identity.

Flying

Whenever an opponent draws a card, you may draw two cards.

Counter target spell.

Return target nonland permanent you don't control to its owner's hand.

Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Exile target permanent with mana value 4 or greater.

Dimir Guildgate enters the battlefield tapped.

{T}: Add {U} or {B}.

{1}, {T}: Add {U}{B}.

Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)

Counter target spell. Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Drowned Catacomb enters the battlefield tapped unless you control an Island or a Swamp.

{T}: Add {U} or {B}.

Choose one --

• Destroy target enchantment.

• Draw two cards.

• Target player discards two cards.

{T}: Add three mana of any one color.

({U/P} can be paid with either {U} or 2 life.)

Look at target player's hand.

Draw a card.

{T}: Another target creature you control gains protection from colorless or from the color of your choice until end of turn.

Glacial Fortress enters the battlefield tapped unless you control a Plains or an Island.

{T}: Add {W} or {U}.

You may have Glasspool Mimic enter the battlefield as a copy of a creature you control, except it's a Shapeshifter Rogue in addition to its other types.

Glasspool Shore enters the battlefield tapped.

{T}: Add {U}.

Until end of turn, whenever a player taps an Island for mana, that player adds an additional {U}.

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

Black spells you cast cost {1} less to cast.

Flying

Creatures your opponents control enter the battlefield tapped.

Flying

When Magister Sphinx enters the battlefield, target player's life total becomes 10.

Flying

Whenever Medomai the Ageless deals combat damage to a player, take an extra turn after this one.

Medomai the Ageless can't attack during extra turns.

{T}: Add {U}.

{2}{U}: Put an hour counter on Midnight Clock.

At the beginning of each upkeep, put an hour counter on Midnight Clock.

When the twelfth hour counter is put on Midnight Clock, shuffle your hand and graveyard into your library, then draw seven cards. Exile Midnight Clock.

Destroy target creature or enchantment.

Copy target instant or sorcery spell, then return it to its owner's hand. You may choose new targets for the copy.

Counter target noncreature spell.

Scry 1.

Draw a card.

Flying

Orzhov Guildgate enters the battlefield tapped.

{T}: Add {W} or {B}.

{1}, {T}: Add {W}{B}.

{T}: Add {C}{C}.

White spells you cast cost {1} less to cast.

({U/P} can be paid with either {U} or 2 life.)

You may have Phyrexian Metamorph enter the battlefield as a copy of any artifact or creature on the battlefield, except it's an artifact in addition to its other types.

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

Destroy target creature. It can't be regenerated. Its controller creates a 3/3 green Ape creature token.

Exile target artifact or creature. Its controller creates a 1/1 blue Bird creature token with flying.

Foretell {U} (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.)

You have no maximum hand size.

{T}: Add {C}.

Flying

As Rescuer Sphinx enters the battlefield, you may return a nonland permanent you control to its owner's hand. If you do, Rescuer Sphinx enters the battlefield with a +1/+1 counter on it.

Counter target spell. Untap up to four lands.

Flying (This creature can't be blocked except by creatures with flying or reach.)

When Riddlemaster Sphinx enters the battlefield, you may return target creature an opponent controls to its owner's hand.

Blue spells you cast cost {1} less to cast.

Flying, vigilance

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

As long as you have 30 or more life, Serra Ascendant gets +5/+5 and has flying.

Flying

Whenever an artifact creature you control deals combat damage to a player, you may create a 1/1 blue Thopter artifact creature token with flying.

Flying

When Sharuum the Hegemon enters the battlefield, you may return target artifact card from your graveyard to the battlefield.

{T}: Add {C}{C}.

Flying

At the beginning of your end step, you gain 3 life if Sphinx Sovereign is untapped. Otherwise, each opponent loses 3 life.

Flying

When Sphinx Summoner enters the battlefield, you may search your library for an artifact creature card, reveal it, put it into your hand, then shuffle.

Flying

Shroud (This creature can't be the target of spells or abilities.)

You may look at the top card of your library any time.

Flying, vigilance

Spells your opponents cast that target Sphinx of New Prahv cost {2} more to cast.

Flying, first strike, vigilance, lifelink, protection from red and from green

Each opponent can't cast instant or sorcery spells during that player's next turn.

You gain X life and draw X cards.

Whenever you draw a card, target opponent mills two cards. If two nonland cards that share a color were milled this way, repeat this process.

{5}{U}: Draw a card, then discard a card.

Choose one or more --

• Counter target spell.

• Counter target activated or triggered ability.

• Return target nonland permanent to its owner's hand.

• Create a token that's a copy of target creature you control.

• Target player draws a card.

This spell can't be countered.

Destroy all creatures.

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

You may activate loyalty abilities of Teferi, Master of Time on any player's turn any time you could cast an instant.

+1: Draw a card, then discard a card.

-3: Target creature you don't control phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)

-10: Take two extra turns after this one.

You have no maximum hand size.

{T}: Add {C}.

Flash

Flying

Spells you cast with mana value 5 or greater cost {1} less to cast and can't be countered.

Flying

Sphinx spells you cast cost {2} less to cast.

Whenever Unesh, Criosphinx Sovereign or another Sphinx enters the battlefield under your control, reveal the top four cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.

{T}: Add {C}. If you control an Urza's Mine and an Urza's Tower, add {C}{C} instead.

{T}: Add {C}. If you control an Urza's Mine and an Urza's Power-Plant, add {C}{C}{C} instead.

You may have Vizier of Many Faces enter the battlefield as a copy of any creature on the battlefield, except if Vizier of Many Faces was embalmed, the token has no mana cost, it's white, and it's a Zombie in addition to its other types.

Embalm {3}{U}{U}

Flying

Creature spells with flying you cast cost {1} less to cast.

Flying

Creature spells with flying you cast cost {1} less to cast.

Whenever another creature with flying enters the battlefield under your control, Watcher of the Spheres gets +1/+1 until end of turn.

Enchant creature

When Waterknot enters the battlefield, tap enchanted creature.

Enchanted creature doesn't untap during its controller's untap step.

Flying

Whenever a creature with flying attacks, you may draw a card.

Flying, vigilance, menace

Whenever Yennett, Cryptic Sovereign attacks, reveal the top card of your library. You may cast it without paying its mana cost if its mana value is odd. If you don't cast it, draw a card.