Command Tower

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

Merchant of Secrets

Commander's Sphere

{T}: Add one mana of any color in your commander's color identity.
Sacrifice this artifact: Draw a card.

Prismatic Lens

{T}: Add {C}.
{1}, {T}: Add one mana of any color.

Wormfang Drake

Flying
When this creature enters, sacrifice it unless you exile a creature you control other than this creature.
When this creature leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Mana Geode

When this artifact enters, scry 1.
{T}: Add one mana of any color.

Azorius Signet

Decanter of Endless Water

You have no maximum hand size.
{T}: Add one mana of any color.

Displace

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

Stratus Walk

Enchant creature
When this Aura enters, draw a card.
Enchanted creature has flying. (It can't be blocked except by creatures with flying or reach.)
Enchanted creature can block only creatures with flying.

Archaeomancer

When this creature enters, return target instant or sorcery card from your graveyard to your hand.

Ichor Wellspring

When this artifact enters or is put into a graveyard from the battlefield, draw a card.

Omen of the Sea

Flash (You may cast this spell any time you could cast an instant.)
When this enchantment enters, scry 2, then draw a card.
{2}{U}, Sacrifice this enchantment: Scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Terramorphic Expanse

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Stupefying Touch

Enchant creature
When this Aura enters, draw a card.
Enchanted creature's activated abilities can't be activated.

Farsight Adept

When this creature enters, you and target opponent each draw a card.

Skyscanner

Flying
When this creature enters, draw a card.

Letter of Acceptance

{T}: Add one mana of any color.
{2}, {T}, Sacrifice this artifact: Draw a card.

Cloudkin Seer

Chosen by Heliod

Enchant creature
When this Aura enters, draw a card.
Enchanted creature gets +0/+2.

Abdel Adrian, Gorion's Ward

When Abdel Adrian enters, exile any number of other nonland permanents you control until Abdel Adrian leaves the battlefield. Create a 1/1 white Soldier creature token for each permanent exiled this way.
Choose a Background (You can have a Background as a second commander.)

Now You See Me . . .

Exile target creature you control, then return it to the battlefield under its owner's control with X +1/+1 counters on it, where X is the number of mirrors on walls you can see from your seat.

Candlekeep Sage

Commander creatures you own have "When this creature enters or leaves the battlefield, draw a card."

Plains

Siren's Ruse

Exile target creature you control, then return that card to the battlefield under its owner's control. If a Pirate was exiled this way, draw a card.

Journey to Nowhere

When this enchantment enters, exile target creature.
When this enchantment leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Momentary Blink

Exile target creature you control, then return it to the battlefield under its owner's control.
Flashback {3}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Altar of the Pantheon

Your devotion to each color and each combination of colors is increased by one.
{T}: Add one mana of any color. If you control a God, a Demigod, or a legendary enchantment, you gain 1 life.

Blur

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

Mnemonic Wall

Defender
When this creature enters, you may return target instant or sorcery card from your graveyard to your hand.

Fellwar Stone

{T}: Add one mana of any color that a land an opponent controls could produce.

Ghostly Flicker

Exile two target artifacts, creatures, and/or lands you control, then return those cards to the battlefield under your control.

Vessel of Endless Rest

When this artifact enters, put target card from a graveyard on the bottom of its owner's library.
{T}: Add one mana of any color.

Bonder's Ornament

{T}: Add one mana of any color.
{4}, {T}: Each player who controls a permanent named Bonder's Ornament draws a card.

Wedding Invitation

When this artifact enters, draw a card.
{T}, Sacrifice this artifact: Target creature can't be blocked this turn. If it's a Vampire, it also gains lifelink until end of turn.

Icy Prison

When this enchantment enters, exile target creature.
At the beginning of your upkeep, sacrifice this enchantment unless any player pays {3}.
When this enchantment leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Peregrine Drake

Flying
When this creature enters, untap up to five lands.

Cartouche of Knowledge

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

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.

Priest of Ancient Lore

When this creature enters, you gain 1 life and draw a card.

Elsewhere Flask

When this artifact enters, draw a card.
Sacrifice this artifact: Choose a basic land type. Each land you control becomes that type until end of turn.

Sleeper Dart

When this artifact enters, draw a card.
{T}, Sacrifice this artifact: Target creature doesn't untap during its controller's next untap step.

Counterspell

Spirited Companion

Tranquil Cove

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {W} or {U}.

Arcane Signet

Ash Barrens

{T}: Add {C}.
Basic landcycling {1} ({1}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

Island

Alchemist's Vial

When this artifact enters, draw a card.
{1}, {T}, Sacrifice this artifact: Target creature can't attack or block this turn.

Inspiring Overseer

Flying
When this creature enters, you gain 1 life and draw a card.

Clockwork Fox

When this creature leaves the battlefield, you draw two cards and each opponent draws a card.

Flicker of Fate

Exile target creature or enchantment, then return it to the battlefield under its owner's control.

Magnifying Glass

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

Lantern of Revealing

{T}: Add one mana of any color.
{4}, {T}: Look at the top card of your library. If it's a land card, you may put it onto the battlefield tapped. If you don't put the card onto the battlefield, you may put it on the bottom of your library.

Skyswimmer Koi

Flying
Whenever an artifact you control enters, you may draw a card. If you do, discard a card.

Justiciar's Portal

Exile target creature you control, then return that card to the battlefield under its owner's control. It gains first strike until end of turn.

Glacial Floodplain

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

Prized Statue

When this artifact enters or is put into a graveyard from the battlefield, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Salvager of Secrets

Acrobatic Maneuver

Scrivener

When this creature enters, you may return target instant card from your graveyard to your hand.

Rescue the Foal

Exile target creature you control, then return that card to the battlefield under its owner's control. (Then exile this card. You may cast the creature later from exile.)

Pegasus Guardian

Flying
At the beginning of your end step, if a permanent you controlled left the battlefield this turn, create a 1/1 white Pegasus creature token with flying.

Pegasus Guardian // Rescue the Foal

Roving Harper

Gilded Pinions

When this Equipment enters, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")
Equipped creature has flying.
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Oblivion Ring

When this enchantment enters, exile another target nonland permanent.
When this enchantment leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Mulldrifter

Flying
When this creature enters, draw two cards.
Evoke {2}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)

Biblioplex Assistant

Flying
When this creature enters, put up to one target instant or sorcery card from your graveyard on top of your library.

Repository Skaab

Exploit (When this creature enters, you may sacrifice a creature.)
When this creature exploits a creature, return target instant or sorcery card from your graveyard to your hand.

Ephemerate

Exile target creature you control, then return it to the battlefield under its owner's control.
Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Mind Stone

{T}: Add {C}.
{1}, {T}, Sacrifice this artifact: Draw a card.

Rousing Read

Enchant creature
When this Aura enters, draw two cards, then discard a card.
Enchanted creature gets +1/+1 and has flying.

Planar Incision

Exile target artifact or creature, then return it to the battlefield under its owner's control with a +1/+1 counter on it.

Guild Globe

When this artifact enters, draw a card.
{2}, {T}, Sacrifice this artifact: Add two mana of different colors.

Angelic Gift

Enchant creature
When this Aura enters, draw a card.
Enchanted creature has flying.

Evolving Wilds

Prophetic Prism

When this artifact enters, draw a card.
{1}, {T}: Add one mana of any color.

Golden Egg

When this artifact enters, draw a card.
{1}, {T}, Sacrifice this artifact: Add one mana of any color.
{2}, {T}, Sacrifice this artifact: You gain 3 life.

Spare Supplies

This artifact enters tapped.
When this artifact enters, draw a card.
{2}, {T}, Sacrifice this artifact: 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.

Thought Vessel

You have no maximum hand size.
{T}: Add {C}.

Cloudshift

Exile target creature you control, then return that card to the battlefield under your control.