Universal Automaton

Changeling (This card is every creature type.)

Sphere of Grace

If a black source would deal damage to you, prevent 2 of that damage.

Duskborne Skymarcher

Flying
{W}, {T}: Target attacking Vampire gets +1/+1 until end of turn.

Skymarcher Aspirant

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)
Skymarcher Aspirant has flying as long as you have the city's blessing.

Paladin of the Bloodstained

When Paladin of the Bloodstained enters, create a 1/1 white Vampire creature token with lifelink.

Sphere of Truth

If a white source would deal damage to you, prevent 2 of that damage.

Bishop's Soldier

Circle of Protection: Black

{1}: The next time a black source of your choice would deal damage to you this turn, prevent that damage.

Arcane Signet

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

Sphere of Duty

If a green source would deal damage to you, prevent 2 of that damage.

Day of Judgment

Paladin of Atonement

At the beginning of each upkeep, if you lost life last turn, put a +1/+1 counter on Paladin of Atonement.
When Paladin of Atonement dies, you gain life equal to its toughness.

Unholy Officiant

Vigilance
{4}{W}: Put a +1/+1 counter on Unholy Officiant.

Bishop of Binding

When Bishop of Binding enters, exile target creature an opponent controls until Bishop of Binding leaves the battlefield.
Whenever Bishop of Binding attacks, target Vampire gets +X/+X until end of turn, where X is the power of the exiled card.

Thorough Investigation

Whenever you attack, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")
Whenever you sacrifice a Clue, venture into the dungeon. (Enter the first room or advance to the next room.)

Legion Conquistador

When Legion Conquistador enters, you may search your library for any number of cards named Legion Conquistador, reveal them, put them into your hand, then shuffle.

Welcoming Vampire

Flying
Whenever one or more other creatures you control with power 2 or less enter, draw a card. This ability triggers only once each turn.

Irregular Cohort

Changeling (This card is every creature type.)
When Irregular Cohort enters, create a 2/2 colorless Shapeshifter creature token with changeling.

Vampire Slayer

Whenever Vampire Slayer deals damage to a Vampire, destroy that creature.

Impostor of the Sixth Pride

Pacifism

Enchant creature
Enchanted creature can't attack or block.

Swords to Plowshares

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

Mirror Entity

Changeling (This card is every creature type.)
{X}: Until end of turn, creatures you control have base power and toughness X/X and gain all creature types.

Plea for Guidance

Search your library for up to two enchantment cards, reveal them, put them into your hand, then shuffle.

Sphere of Reason

If a blue source would deal damage to you, prevent 2 of that damage.

Wrath of God

Destroy all creatures. They can't be regenerated.

Karma

At the beginning of each player's upkeep, Karma deals damage to that player equal to the number of Swamps they control.

Story Circle

As Story Circle enters, choose a color.
{W}: The next time a source of your choice of the chosen color would deal damage to you this turn, prevent that damage.

Bishop of Rebirth

Vigilance
Whenever Bishop of Rebirth attacks, you may return target creature card with mana value 3 or less from your graveyard to the battlefield.

Enchant creature
Enchanted creature gets +2/+2, has first strike, and is a Knight in addition to its other types. (It deals combat damage before creatures without first strike.)

Circle of Protection: Blue

{1}: The next time a blue source of your choice would deal damage to you this turn, prevent that damage.

Force of Virtue

If it's not your turn, you may exile a white card from your hand rather than pay this spell's mana cost.
Flash
Creatures you control get +1/+1.

Famished Paladin

Famished Paladin doesn't untap during your untap step.
Whenever you gain life, untap Famished Paladin.

Glorifier of Dusk

Pay 2 life: Glorifier of Dusk gains flying until end of turn.
Pay 2 life: Glorifier of Dusk gains vigilance until end of turn.

Sanguine Glorifier

When Sanguine Glorifier enters, put a +1/+1 counter on another target Vampire you control.

Circle of Protection: Artifacts

{2}: The next time an artifact source of your choice would deal damage to you this turn, prevent that damage.

Plains

Search the Premises

Whenever a creature attacks you or a planeswalker you control, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

Condemn

Put target attacking creature on the bottom of its owner's library. Its controller gains life equal to its toughness.

Mind Stone

{T}: Add {C}.
{1}, {T}, Sacrifice Mind Stone: Draw a card.

Wooden Stake

Equipped creature gets +1/+0.
Whenever equipped creature blocks or becomes blocked by a Vampire, destroy that creature. It can't be regenerated.
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Bloodline Pretender

Changeling (This card is every creature type.)
As Bloodline Pretender enters, choose a creature type.
Whenever another creature you control of the chosen type enters, put a +1/+1 counter on Bloodline Pretender.

Avian Changeling

Changeling (This card is every creature type.)
Flying

Fumigate

Destroy all creatures. You gain 1 life for each creature destroyed this way.

Inspiring Cleric

When Inspiring Cleric enters, you gain 4 life.

Idyllic Tutor

Search your library for an enchantment card, reveal it, put it into your hand, then shuffle.

Justice

At the beginning of your upkeep, sacrifice Justice unless you pay {W}{W}.
Whenever a red creature or spell deals damage, Justice deals that much damage to that creature's or spell's controller.

Circle of Protection: Green

{1}: The next time a green source of your choice would deal damage to you this turn, prevent that damage.

Skeleton Key

Equipped creature has skulk. (It can't be blocked by creatures with greater power.)
Whenever equipped creature deals combat damage to a player, you may draw a card. If you do, discard a card.
Equip {2}

Commander's Sphere

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

Sphere of Law

If a red source would deal damage to you, prevent 2 of that damage.

Circle of Protection: Red

{1}: The next time a red source of your choice would deal damage to you this turn, prevent that damage.

Circle of Protection: White

{1}: The next time a white source of your choice would deal damage to you this turn, prevent that damage.

Adanto Vanguard

As long as Adanto Vanguard is attacking, it gets +2/+0.
Pay 4 life: Adanto Vanguard gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Mavren Fein, Dusk Apostle

Whenever one or more nontoken Vampires you control attack, create a 1/1 white Vampire creature token with lifelink.

Skyblade of the Legion

Changeling Sentinel

Changeling (This card is every creature type.)
Vigilance

Rashka the Slayer

Reach (This creature can block creatures with flying.)
Whenever Rashka the Slayer blocks one or more black creatures, Rashka gets +1/+2 until end of turn.

Disenchant

Sol Ring

Exultant Skymarcher

Martyr of Dusk

When Martyr of Dusk dies, create a 1/1 white Vampire creature token with lifelink.

Generous Gift

Destroy target permanent. Its controller creates a 3/3 green Elephant creature token.

Faith Unbroken

Enchant creature you control
When Faith Unbroken enters, exile target creature an opponent controls until Faith Unbroken leaves the battlefield.
Enchanted creature gets +2/+2.

Forerunner of the Legion

When Forerunner of the Legion enters, you may search your library for a Vampire card, reveal it, then shuffle and put that card on top.
Whenever another Vampire you control enters, target creature gets +1/+1 until end of turn.

Cathedral of War

Cathedral of War enters tapped.
Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
{T}: Add {C}.

Sphere of Purity

If an artifact would deal damage to you, prevent 1 of that damage.

Path to Exile

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.