Plains

Dawnstrike Paladin

Vigilance (Attacking doesn't cause this creature to tap.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)

On the Job

Creatures you control get +2/+1 until end of turn. Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

Clarion Cathars

When this creature enters, create a 1/1 white Human creature token.

Negate

Azorius Locket

{T}: Add {W} or {U}.
{W/U}{W/U}{W/U}{W/U}, {T}, Sacrifice this artifact: Draw two cards.

Gallant Cavalry

Vigilance (Attacking doesn't cause this creature to tap.)
When this creature enters, create a 2/2 white Knight creature token with vigilance.

Brokers Hideout

When this land enters, sacrifice it. When you do, search your library for a basic Forest, Plains, or Island card, put it onto the battlefield tapped, then shuffle and you gain 1 life.

Azorius Chancery

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

Third Path Savant

Azorius Signet

Caravan Escort

Level up {2} ({2}: Put a level counter on this. Level up only as a sorcery.)
LEVEL 1-4
2/2
LEVEL 5+
5/5
First strike

Gryff Vanguard

Flying
When this creature enters, draw a card.

Order of the Golden Cricket

Whenever this creature attacks, you may pay {W}. If you do, it gains flying until end of turn.

Tranquil Cove

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

Benalish Cavalry

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

Marshal of Zhalfir

Other Knights you control get +1/+1.
{W}{U}, {T}: Tap another target creature.

Makeshift Binding

When this enchantment enters, exile target creature an opponent controls until this enchantment leaves the battlefield. You gain 2 life.

Goliath Paladin

Vigilance
When this creature enters, you take the initiative.

Escape Tunnel

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
{T}, Sacrifice this land: Target creature with power 2 or less can't be blocked this turn.

Thunderhead Squadron

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Flying

Eagles of the North

Flying
When this creature enters, creatures you control get +1/+0 and gain first strike until end of turn.
Plainscycling {1} ({1}, Discard this card: Search your library for a Plains card, reveal it, put it into your hand, then shuffle.)

Daring Skyjek

Battalion — Whenever this creature and at least two other creatures attack, this creature gains flying until end of turn.

Gryff Rider

Flying
Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.)

Shining Armor

Flash
When this Equipment enters, attach it to target Knight you control.
Equipped creature gets +0/+2 and has vigilance.
Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)

Idyllic Beachfront

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

Preening Champion

Flying
When this creature enters, create a 1/1 blue and red Elemental creature token.

Make Your Move

Destroy target artifact, enchantment, or creature with power 4 or greater.

Island

Benalish Lancer

Kicker {2}{W} (You may pay an additional {2}{W} as you cast this spell.)
If this creature was kicked, it enters with two +1/+1 counters on it and with first strike.

Sentinel's Eyes

Enchant creature
Enchanted creature gets +1/+1 and has vigilance.
Escape—{W}, Exile two other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Attended Knight

First strike
When this creature enters, create a 1/1 white Soldier creature token.

Steadfast Paladin

Knight of Cliffhaven

Level up {3} ({3}: Put a level counter on this. Level up only as a sorcery.)
LEVEL 1-3
2/3
Flying
LEVEL 4+
4/4
Flying, vigilance

Mesa Cavalier

Flying
When this creature enters, you gain 2 life.

Paladin of the Bloodstained

When this creature enters, create a 1/1 white Vampire creature token with lifelink.

Mind Stone

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

Meeting of Minds

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Draw two cards.

Knighted Myr

{2}{W}: Adapt 1. (If this creature has no +1/+1 counters on it, put a +1/+1 counter on it.)
Whenever one or more +1/+1 counters are put on this creature, it gains double strike until end of turn.

Swordsworn Cavalier

This creature has first strike as long as another Knight entered the battlefield under your control this turn.

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.

Order of the Alabaster Host

Whenever this creature becomes blocked by a creature, the blocking creature gets -1/-1 until end of turn.

Order of the Mirror

{3}{W/P}: Transform this creature. Activate only as a sorcery. ({W/P} can be paid with either {W} or 2 life.)

Order of the Mirror // Order of the Alabaster Host

Prismatic Lens

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

Kithkin Billyrider

Inspiring Captain

When this creature enters, creatures you control get +1/+1 until end of turn.

Relief Captain

When this creature enters, support 3. (Put a +1/+1 counter on each of up to three other target creatures.)

Skybridge Towers

This land enters tapped.
{T}: Add {W} or {U}.
{2}{W}{U}, {T}, Sacrifice this land: Draw a card.

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.)

Argivian Cavalier

Enlist (As this creature attacks, you may tap a nonattacking creature you control without summoning sickness. When you do, add its power to this creature's until end of turn.)
When this creature enters, create a 1/1 white Soldier creature token.

Tandem Lookout

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.)
As long as Tandem Lookout is paired with another creature, each of those creatures has "Whenever this creature deals damage to an opponent, draw a card."

Protocol Knight

When this creature enters, tap target creature an opponent controls. Put a stun counter on that creature if you control another Knight. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Sky Diamond

This artifact enters tapped.
{T}: Add {U}.

Jousting Dummy

{3}: This creature gets +1/+0 until end of turn.

East-Mark Cavalier

Vigilance
Whenever this creature deals damage to a Goblin or Orc, destroy that creature.

Cavalry Drillmaster

When this creature enters, target creature gets +2/+0 and gains first strike until end of turn. (It deals combat damage before creatures without first strike.)

Command Tower

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

Universal Automaton

Changeling (This card is every creature type.)

Knight of the New Coalition

Vigilance
When this creature enters, create a 2/2 white and blue Knight creature token with vigilance.

Skyhunter Skirmisher

Devoted Paladin

Beacon of Hope — When this creature enters, creatures you control get +1/+1 and gain vigilance until end of turn.

Lionheart Maverick

Vigilance
{4}{W}: This creature gets +1/+2 until end of turn.

Ledev Guardian

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

Kor Halberd

Equipped creature gets +1/+1 and has vigilance.
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Westfold Rider

Sacrifice this creature: Destroy target artifact or enchantment. Activate only as a sorcery.

Knight of Old Benalia

Suspend 5—{W} (Rather than cast this card from your hand, you may pay {W} and exile it with five time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. It has haste.)
When this creature enters, other creatures you control get +1/+1 until end of turn.

Marble Diamond

This artifact enters tapped.
{T}: Add {W}.

Dizzying Swoop

Tap up to two target creatures. (Then exile this card. You may cast the creature later from exile.)

Ardenvale Tactician

Ardenvale Tactician // Dizzying Swoop

Azorius Knight-Arbiter

Vigilance
This creature can't be blocked.

Path of Ancestry

This land enters tapped.
{T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Deep Analysis

Target player draws two cards.
Flashback—{1}{U}, Pay 3 life. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Obscura Storefront

When this land enters, sacrifice it. When you do, search your library for a basic Plains, Island, or Swamp card, put it onto the battlefield tapped, then shuffle and you gain 1 life.

Leonin Skyhunter

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.)

Parhelion Patrol

Flying
Vigilance (Attacking doesn't cause this creature to tap.)
Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

Slumbering Keepguard

Whenever an enchantment you control enters, scry 1.
{2}{W}: This creature gets +1/+1 until end of turn for each enchantment you control.