Seeker of Insight

{T}: Draw a card, then discard a card. Activate only if you've cast a noncreature spell this turn.

Weldfast Wingsmith

Whenever an artifact you control enters, this creature gains flying until end of turn.

Glintwing Invoker

{7}{U}: This creature gets +3/+3 and gains flying until end of turn.

Riddleform

Whenever you cast a noncreature spell, you may have this enchantment become a 3/3 Sphinx creature with flying in addition to its other types until end of turn.
{2}{U}: Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Floodhound

{3}, {T}: Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

Cloud of Faeries

Flying
When this creature enters, untap up to two lands.
Cycling {2} ({2}, Discard this card: Draw a card.)

Wall of Water

Defender (This creature can't attack.)
{U}: This creature gets +1/+0 until end of turn.

Sage's Row Denizen

Whenever another blue creature you control enters, target player mills two cards.

Merfolk Traders

When this creature enters, draw a card, then discard a card.

Cartouche of Knowledge

Enchant creature you control
When this Aura enters, draw a card.
Enchanted creature gets +1/+1 and has flying.

Tidal Surge

Tap up to three target creatures without flying.

Faerie Mechanist

Flying
When this creature enters, look at the top three cards of your library. You may reveal an artifact card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Wall of Frost

Defender
Whenever this creature blocks a creature, that creature doesn't untap during its controller's next untap step.

Mirozel

Flying
When this creature becomes the target of a spell or ability, return this creature to its owner's hand.

Twiddle

You may tap or untap target artifact, creature, or land.

Blur

Exile target creature you control, then return that card to the battlefield under its owner's control.
Draw a card.

Pelargir Survivor

{T}: Add one mana of any color. Spend this mana only to cast an instant or sorcery spell.
{5}{U}, {T}: Target player mills three cards. (They put the top three cards of their library into their graveyard.)

Ascending Aven

Flying
This creature can block only creatures with flying.
Morph {2}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Snow Devil

Enchant creature
Enchanted creature has flying.
Enchanted creature has first strike as long as it's blocking and you control a snow land.

Silent Departure

Return target creature to its owner's hand.
Flashback {4}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Peek

Look at target player's hand.
Draw a card.

Grasp of Phantoms

Put target creature on top of its owner's library.
Flashback {7}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Thought Courier

Sage's Row Savant

Discombobulate

Counter target spell. Look at the top four cards of your library, then put them back in any order.

Code of Constraint

Target creature gets -4/-0 until end of turn.
Draw a card.
Addendum — If you cast this spell during your main phase, tap that creature and it doesn't untap during its controller's next untap step.

Aether Theorist

When this creature enters, you get {E}{E}{E} (three energy counters).
{T}, Pay {E}: Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Esper Battlemage

{W}, {T}: Prevent the next 2 damage that would be dealt to you this turn.
{B}, {T}: Target creature gets -1/-1 until end of turn.

Floodwaters

Return up to two target creatures to their owners' hands.
Cycling {2} ({2}, Discard this card: Draw a card.)

Sage Aven

Flying (This creature can't be blocked except by creatures with flying or reach.)
When this creature enters, look at the top four cards of your library, then put them back in any order.

Eternity Snare

Enchant creature
When this Aura enters, draw a card.
Enchanted creature doesn't untap during its controller's untap step.

Stalked Researcher

Defender
Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, this creature can attack this turn as though it didn't have defender.

Dominate

Gain control of target creature with mana value X or less.

Headwater Sentries

Glimpse the Future

Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.

Sibsig Appraiser

When this creature enters, look at the top two cards of your library. Put one of them into your hand and the other into your graveyard.

Displace

Exile up to two target creatures you control, then return those cards to the battlefield under their owner's control.

Metathran Soldier

Make Disappear

Casualty 1 (As you cast this spell, you may sacrifice a creature with power 1 or greater. When you do, copy this spell and you may choose a new target for the copy.)
Counter target spell unless its controller pays {2}.

Selhoff Entomber

{T}, Discard a creature card: Draw a card.

Chain to Memory

Target creature gets -4/-0 until end of turn. Scry 2.

Meldweb Strider

Vigilance
This Vehicle enters with an oil counter on it.
Remove an oil counter from this Vehicle: It becomes an artifact creature until end of turn.
Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)

Cloudform

When this enchantment enters, it becomes an Aura with enchant creature. Manifest the top card of your library and attach this enchantment to it. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)
Enchanted creature has flying and hexproof.

Call to Mind

Return target instant or sorcery card from your graveyard to your hand.

Hard Evidence

Create a 0/3 blue Crab creature token.
Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

Nimble Innovator

Crafty Pathmage

{T}: Target creature with power 2 or less can't be blocked this turn.

Unsummon

Return target creature to its owner's hand.

Hapless Researcher

Sacrifice this creature: Draw a card, then discard a card.

Waterwhirl

Return up to two target creatures to their owners' hands.

Storm Crow

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

Gossamer Phantasm

Flying
When this creature becomes the target of a spell or ability, sacrifice it.

Riptide Turtle

Mind Games

Buyback {2}{U} (You may pay an additional {2}{U} as you cast this spell. If you do, put this card into your hand as it resolves.)
Tap target artifact, creature, or land.

Unexplained Disappearance

Return target creature to its owner's hand.
Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Reality Acid

Enchant permanent
Vanishing 3 (This Aura enters with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
When this Aura leaves the battlefield, enchanted permanent's controller sacrifices it.

Sage of Mysteries

Constellation — Whenever an enchantment you control enters, target player mills two cards.

Repeal

Return target nonland permanent with mana value X to its owner's hand.
Draw a card.

Interdict

Counter target activated ability from an artifact, creature, enchantment, or land. That permanent's activated abilities can't be activated this turn. (Mana abilities can't be targeted.)
Draw a card.

Rakshasa's Disdain

Counter target spell unless its controller pays {1} for each card in your graveyard.

Spindrift Drake

Flying
At the beginning of your upkeep, sacrifice this creature unless you pay {U}.

Guidestone Compass

{1}, {T}: Target creature you control explores. Activate only as a sorcery. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on that creature, then put the card back or put it into your graveyard.)

Lodestone Needle

Flash
When this artifact enters, tap up to one target artifact or creature and put two stun counters on it.
Craft with artifact {2}{U} ({2}{U}, Exile this artifact, Exile another artifact you control or an artifact card from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)

Lodestone Needle // Guidestone Compass

Phantasmal Terrain

Enchant land
As this Aura enters, choose a basic land type.
Enchanted land is the chosen type.

Octo Opus

When this enchantment enters, create a 4/4 blue Octopus Performer creature token named Contortionist with "At the beginning of your upkeep, you may fold this token in half." (It becomes 2/2, then 1/1, ½/½, and so on.)
Sacrifice this enchantment: Draw a card and an additional card for each of Contortionist's folds.

Oracle of Dust

Devoid (This card has no color.)
{2}, Put a card an opponent owns from exile into that player's graveyard: Draw a card, then discard a card.

Capsize

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Return target permanent to its owner's hand.

Shocking Grasp

Target creature gets -2/-0 until end of turn.
Draw a card.

Temporal Eddy

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

Clever Conjurer

Mage Hand — {T}: Untap target permanent not named Clever Conjurer. Activate only as a sorcery.

Runner's Bane

Enchant creature with power 3 or less
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Littjara Kinseekers

Changeling (This card is every creature type.)
When this creature enters, if you control three or more creatures that share a creature type, put a +1/+1 counter on this creature, then scry 1.

Aetherize

Return all attacking creatures to their owner's hand.

Portal Mage

Flash
When this creature enters during the declare attackers step, you may reselect which player or permanent target attacking creature is attacking. (It can't attack its controller or their permanents.)

Biting Tether

Enchant creature
You control enchanted creature.
At the beginning of your upkeep, put a -1/-1 counter on enchanted creature.

Trip Up

Target nonland permanent's owner puts it on their choice of the top or bottom of their library.
Cycling {2} ({2}, Discard this card: Draw a card.)

Teferi's Time Twist

Exile target permanent you control. Return that card to the battlefield under its owner's control at the beginning of the next end step. If it enters as a creature, it enters with an additional +1/+1 counter on it.

Tamiyo Meets the Story Circle

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Until your next turn, whenever a creature attacks you or a planeswalker you control, it gets -2/-0 until end of turn.
II — Discard any number of cards, then investigate twice for each card discarded this way.
III — Shuffle up to three target cards from your graveyard into your library.

Air Elemental

Breezekeeper

Flying
Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.)

Murk Strider

Devoid (This card has no color.)
When this creature enters, you may put a card an opponent owns from exile into that player's graveyard. If you do, return target creature to its owner's hand.

Skygames

Enchant land
Enchanted land has "{T}: Target creature gains flying until end of turn. Activate only as a sorcery."

Benthicore

When this creature enters, create two 1/1 blue Merfolk Wizard creature tokens.
Tap two untapped Merfolk you control: Untap this creature. It gains shroud until end of turn. (It can't be the target of spells or abilities.)

Wistful Thinking

Target player draws two cards, then discards four cards.

Magic Damper

Target creature you control gets +1/+1 and gains hexproof until end of turn. Untap it.

Escaped Experiment

Whenever this creature attacks, target creature an opponent controls gets -X/-0 until end of turn, where X is the number of artifacts you control.

Dream Twist

Target player mills three cards.
Flashback {1}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Unsubstantiate

Return target spell or creature to its owner's hand.

Tolarian Sentinel

Flying
{U}, {T}, Discard a card: Return target permanent you control to its owner's hand.

Nightveil Sprite

Flying
Whenever this creature attacks, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Alora, Merry Thief

Whenever you attack, up to one target attacking creature can't be blocked this turn. Return that creature to its owner's hand at the beginning of the next end step.
Choose a Background (You can have a Background as a second commander.)

Balshan Beguiler

Whenever this creature deals combat damage to a player, that player reveals the top two cards of their library. You choose one of those cards and put it into their graveyard.

Senate Courier

Flying
{1}{W}: This creature gains vigilance until end of turn.

Vanishing

Enchant creature
{U}{U}: Enchanted creature phases out. (While it's phased out, it's treated as though it doesn't exist. It phases in before its controller untaps during their next untap step.)

Deliberate

Thassa's Emissary

Bestow {5}{U} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)
Whenever this creature or enchanted creature deals combat damage to a player, draw a card.
Enchanted creature gets +3/+3.

Imagecrafter

{T}: Choose a creature type other than Wall. Target creature becomes that type until end of turn.

Archipelagore

Mutate {5}{U} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Whenever this creature mutates, tap up to X target creatures, where X is the number of times this creature has mutated. Those creatures don't untap during their controller's next untap step.

Balduvian Shaman

{T}: Change the text of target white enchantment you control that doesn't have cumulative upkeep by replacing all instances of one color word with another. (For example, you may change "black creatures can't attack" to "blue creatures can't attack.") That enchantment gains "Cumulative upkeep {1}." (At the beginning of its controller's upkeep, that player puts an age counter on it, then sacrifices it unless they pay its upkeep cost for each age counter on it.)

Jhessian Thief

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever this creature deals combat damage to a player, draw a card.

Petrifying Meddler

Devoid (This card has no color.)
When you cast this spell, tap up to one target creature and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Reach

Ancient Crab

Spellweaver Eternal

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Afflict 2 (Whenever this creature becomes blocked, defending player loses 2 life.)

Power Sink

Counter target spell unless its controller pays {X}. If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.

Countervailing Winds

Counter target spell unless its controller pays {1} for each card in your graveyard.
Cycling {2} ({2}, Discard this card: Draw a card.)