Psionic Spells -- When Aberrant Mind Sorcerer enters the battlefield, choose target instant or sorcery card in your graveyard, then roll a d20.

1--9 | You may put that card on top of your library.

10--20 | Return that card to your hand.

Counter target spell. You gain 3 life.

{T}: Add {C}.

{T}: Add {W} or {U}. Adarkar Wastes deals 1 damage to you.

When Aether Adept enters the battlefield, return target creature to its owner's hand.

Flying

Revolt -- When Airdrop Aeronauts enters the battlefield, if a permanent you controlled left the battlefield this turn, you gain 5 life.

Whenever a creature enters the battlefield under your control, you gain 1 life.

Whenever another permanent enters the battlefield under your control, each opponent mills a card.

Counter target noncreature spell. Its controller creates two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")

{T}: Add {W}.

Counter target artifact or enchantment spell.

Counter target spell. Its controller may draw up to two cards at the beginning of the next turn's upkeep.

You draw a card at the beginning of the next turn's upkeep.

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

Protection from black and from red

Whenever another creature enters the battlefield, you may gain 1 life.

Azorius Chancery enters the battlefield tapped.

When Azorius Chancery enters the battlefield, return a land you control to its owner's hand.

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

Azorius Guildgate enters the battlefield tapped.

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

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

Boreal Shelf enters the battlefield tapped.

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

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

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

Whenever you gain life, put a +1/+1 counter on Celestial Unicorn.

Citadel Gate enters the battlefield tapped.

As Citadel Gate enters the battlefield, choose a color other than white.

{T}: Add {W} or one mana of the chosen color.

(Gain the next level as a sorcery to add its ability.)

If you would gain life, you gain that much life plus 1 instead.

{3}{W}: Level 2

Whenever you gain life, put a +1/+1 counter on target creature you control.

{4}{W}: Level 3

When this Class becomes level 3, return target creature card from your graveyard to the battlefield. You gain life equal to that creature's toughness.

Enchant creature

Enchanted creature has phasing and can't be blocked except by Walls. (It phases in or out before its controller untaps during each of their untap steps. While it's phased out, it's treated as though it doesn't exist.)

Flying

When Cloudblazer enters the battlefield, you gain 2 life and draw two cards.

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

Counter target spell. Search its controller's graveyard, hand, and library for all cards with the same name as that spell and exile them. Then that player shuffles.

Counter target spell.

Deserted Beach enters the battlefield tapped unless you control two or more other lands.

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

Counter target spell. If an artifact or creature spell is countered this way, put that card onto the battlefield under your control instead of into its owner's graveyard.

Return target nonland permanent to its owner's hand.

This spell can't be countered.

Counter target noncreature spell.

Return target creature to its owner's hand.

Draw a card.

Search your library for an artifact or enchantment card, reveal it, then shuffle and put that card on top.

Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is Esper Sentinel's power.

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

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

Whenever Hada Freeblade or another Ally enters the battlefield under your control, you may put a +1/+1 counter on Hada Freeblade.

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

As Hallowed Fountain enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

When Honorable Scout enters the battlefield, you gain 2 life for each black and/or red creature target opponent controls.

Whenever another creature enters the battlefield under your control, you gain 1 life.

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

Irrigated Farmland enters the battlefield tapped.

Cycling {2} ({2}, Discard this card: Draw a card.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

First strike, vigilance

Whenever Kazandu Blademaster or another Ally enters the battlefield under your control, you may put a +1/+1 counter on Kazandu Blademaster.

Whenever Kor Celebrant or another creature enters the battlefield under your control, you gain 1 life.

Enchant creature

Enchanted creature has "Whenever you gain life, put that many +1/+1 counters on this creature."

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)

Equip {0}

Flying

At the beginning of your end step, if a permanent you controlled left the battlefield this turn, put a +1/+1 counter on each tapped creature you control, then untap them.

Choose a Background (You can have a Background as a second commander.)

Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.

When Meadowboon leaves the battlefield, put a +1/+1 counter on each creature target player controls.

Evoke {3}{W} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

Meandering River enters the battlefield tapped.

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

Counter target noncreature spell.

{T}: Add {C}.

{T}: Add {W}. Activate only if you control an Island.

{T}: Add {U}. Activate only if you control a Plains.

Whenever Ondu Cleric or another Ally enters the battlefield under your control, you may gain life equal to the number of Allies you control.

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

As Port Town enters the battlefield, you may reveal a Plains or Island card from your hand. If you don't, Port Town enters the battlefield tapped.

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

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

Prairie Stream enters the battlefield tapped unless you control two or more basic lands.

Razortide Bridge enters the battlefield tapped.

Indestructible

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

Target artifact, creature, or land 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.)

You have no maximum hand size.

{T}: Add {C}.

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

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

Flying

When Rishadan Brigand enters the battlefield, each opponent sacrifices a permanent unless they pay {3}.

Rishadan Brigand can block only creatures with flying.

Equipped creature gets +0/+3.

Astral Projection -- {1}{W}: Equipped creature phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)

Equip {1}

Flying

Landfall -- Whenever a land enters the battlefield under your control, you may gain control of target creature for as long as you control Roil Elemental.

Flying

When Sage Owl enters the battlefield, look at the top four cards of your library, then put them back in any order.

Flying

When Sawtooth Loon enters the battlefield, return a white or blue creature you control to its owner's hand.

When Sawtooth Loon enters the battlefield, draw two cards, then put two cards from your hand on the bottom of your library.

Sea Gate enters the battlefield tapped.

As Sea Gate enters the battlefield, choose a color other than blue.

{T}: Add {U} or one mana of the chosen color.

Sea of Clouds enters the battlefield tapped unless you have two or more opponents.

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

As Shimmer enters the battlefield, choose a land type.

Each land of the chosen type has phasing. (It phases in or out before its controller untaps during each of their untap steps. While it's phased out, it's treated as though it doesn't exist.)

Flying

When Shrieking Drake enters the battlefield, return a creature you control to its owner's hand.

Skybridge Towers enters the battlefield tapped.

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

{2}{W}{U}, {T}, Sacrifice Skybridge Towers: Draw a card.

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

Put a +1/+1 counter on target creature. It phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)

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

Whenever another creature enters the battlefield, you may gain 1 life.

Enchant creature (Target a creature as you cast this. This card enters the battlefield attached to that creature.)

Whenever enchanted creature deals damage, you gain that much life.

Enchant creature

Enchanted creature has "Whenever you gain life, put that many +1/+1 counters on this creature."

Exile target creature. Its controller gains life equal to its power.

Enchant artifact or creature

Enchanted permanent has phasing. (It phases in or out before its controller untaps during each of their untap steps. While it's phased out, it's treated as though it doesn't exist.)

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.)

Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)

{U}{U}: Teferi's Honor Guard phases out. (While it's phased out, it's treated as though it doesn't exist. It phases in before you untap during your next untap step.)

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.)

Whenever Teferi's Imp phases out, discard a card.

Whenever Teferi's Imp phases in, draw a card.

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.)

Teferi's Isle enters the battlefield tapped.

{T}: Add {U}{U}.

At the beginning of each player's upkeep, that player chooses artifact, creature, land, or non-Aura enchantment. All nontoken permanents of that type phase out. (While they're phased out, they're treated as though they don't exist. Each one phases in before its controller untaps during their next untap step.)

Whenever a creature you control attacks, it phases out at end of combat. (While it's phased out, it's treated as though it doesn't exist. It phases in before you untap during your next untap step.)

Temple of Enlightenment enters the battlefield tapped.

When Temple of Enlightenment enters the battlefield, scry 1.

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

You have no maximum hand size.

{T}: Add {C}.

Tranquil Cove enters the battlefield tapped.

When Tranquil Cove enters the battlefield, you gain 1 life.

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

Flying

Whenever Umara Raptor or another Ally enters the battlefield under your control, you may put a +1/+1 counter on Umara Raptor.

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.)

{U}{U}, {T}: Target 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.)

Whenever you gain life, put a +1/+1 counter on Voice of the Blessed.

As long as Voice of the Blessed has four or more +1/+1 counters on it, it has flying and vigilance.

As long as Voice of the Blessed has ten or more +1/+1 counters on it, it has indestructible.

Flying

When Wispmare enters the battlefield, destroy target enchantment.

Evoke {W} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

(Gain the next level as a sorcery to add its ability.)

You have no maximum hand size.

{2}{U}: Level 2

When this Class becomes level 2, draw two cards.

{4}{U}: Level 3

Whenever you draw a card, put a +1/+1 counter on target creature you control.

When Wu Spy enters the battlefield, look at the top two cards of target player's library. Put one of them into their graveyard.