Adult Gold Dragon

Gisela, Blade of Goldnight

Flying, first strike
If a source would deal damage to an opponent or a permanent an opponent controls, that source deals double that damage to that player or permanent instead.
If a source would deal damage to you or a permanent you control, prevent half that damage, rounded up.

Sacred Peaks

({T}: Add {R} or {W}.)
Sacred Peaks enters tapped.

Firesong and Sunspeaker

Red instant and sorcery spells you control have lifelink.
Whenever a white instant or sorcery spell causes you to gain life, Firesong and Sunspeaker deals 3 damage to target creature or player.

Atalya, Samite Master

{X}, {T}: Choose one —
• Prevent the next X damage that would be dealt to target creature this turn. Spend only white mana on X.
• You gain X life. Spend only white mana on X.

Deafening Clarion

Choose one or both —
• Deafening Clarion deals 3 damage to each creature.
• Creatures you control gain lifelink until end of turn.

Loxodon Anchorite

{T}: Prevent the next 2 damage that would be dealt to any target this turn.

Fire Diamond

Fire Diamond enters tapped.
{T}: Add {R}.

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.

Benevolent Ancestor

Defender (This creature can't attack.)
{T}: Prevent the next 1 damage that would be dealt to any target this turn.

Orim, Samite Healer

{T}: Prevent the next 3 damage that would be dealt to any target this turn.

Guardian Seraph

Flying
If a source an opponent controls would deal damage to you, prevent 1 of that damage.

Kithkin Healer

{T}: Prevent the next 1 damage that would be dealt to any target this turn.

Phyrexian Vindicator

Flying
If damage would be dealt to Phyrexian Vindicator, prevent that damage. When damage is prevented this way, Phyrexian Vindicator deals that much damage to any other target.

Deflecting Palm

The next time a source of your choice would deal damage to you this turn, prevent that damage. If damage is prevented this way, Deflecting Palm deals that much damage to that source's controller.

Marble Diamond

Marble Diamond enters tapped.
{T}: Add {W}.

Intimidation Bolt

Intimidation Bolt deals 3 damage to target creature. Other creatures can't attack this turn.

Kitsune Palliator

{T}: Prevent the next 1 damage that would be dealt to each creature and each player this turn.

Samite Healer

Stomp

Damage can't be prevented this turn. Stomp deals 2 damage to any target.

Bonecrusher Giant

Whenever Bonecrusher Giant becomes the target of a spell, Bonecrusher Giant deals 2 damage to that spell's controller.

Bonecrusher Giant // Stomp

Hallowed Healer

{T}: Prevent the next 2 damage that would be dealt to any target this turn.
Threshold — {T}: Prevent the next 4 damage that would be dealt to any target this turn. Activate only if seven or more cards are in your graveyard.

Browbeat

Any player may have Browbeat deal 5 damage to them. If no one does, target player draws three cards.

Swords to Plowshares

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

Kitsune Healer

{T}: Prevent the next 1 damage that would be dealt to any target this turn.
{T}: Prevent all damage that would be dealt to target legendary creature this turn.

Lightning Helix

Lightning Helix deals 3 damage to any target and you gain 3 life.

Lorehold Campus

Lorehold Campus enters tapped.
{T}: Add {R} or {W}.
{4}, {T}: Scry 1.

Abraded Bluffs

Abraded Bluffs enters tapped.
When Abraded Bluffs enters, it deals 1 damage to target opponent.
{T}: Add {R} or {W}.

Righteous Valkyrie

Flying
Whenever another Angel or Cleric you control enters, you gain life equal to that creature's toughness.
As long as you have at least 7 life more than your starting life total, creatures you control get +2/+2.

Ajani Steadfast

+1: Until end of turn, up to one target creature gets +1/+1 and gains first strike, vigilance, and lifelink.
−2: Put a +1/+1 counter on each creature you control and a loyalty counter on each other planeswalker you control.
−7: You get an emblem with "If a source would deal damage to you or a planeswalker you control, prevent all but 1 of that damage."

Candles' Glow

Prevent the next 3 damage that would be dealt to any target this turn. You gain life equal to the damage prevented this way.
Splice onto Arcane {1}{W} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Truefire Paladin

Vigilance
{R}{W}: Truefire Paladin gets +2/+0 until end of turn.
{R}{W}: Truefire Paladin gains first strike until end of turn.

Boros Charm

Choose one —
• Boros Charm deals 4 damage to target player or planeswalker.
• Permanents you control gain indestructible until end of turn.
• Target creature gains double strike until end of turn.

Battlefield Medic

{T}: Prevent the next X damage that would be dealt to target creature this turn, where X is the number of Clerics on the battlefield.

Noble Vestige

Flying
{T}: Prevent the next 1 damage that would be dealt to target player or planeswalker this turn.

Acolyte's Reward

Prevent the next X damage that would be dealt to target creature this turn, where X is your devotion to white. If damage is prevented this way, Acolyte's Reward deals that much damage to any target. (Each {W} in the mana costs of permanents you control counts toward your devotion to white.)

Combat Medic

{1}{W}: Prevent the next 1 damage that would be dealt to any target this turn.

Clergy en-Vec

Fire Prophecy

Fire Prophecy deals 3 damage to target creature. You may put a card from your hand on the bottom of your library. If you do, draw a card.

Daunting Defender

If a source would deal damage to a Cleric creature you control, prevent 1 of that damage.

Hedron-Field Purists

Level up {2}{W} ({2}{W}: Put a level counter on this. Level up only as a sorcery.)
LEVEL 1-4
1/4
If a source would deal damage to you or a creature you control, prevent 1 of that damage.
LEVEL 5+
2/5
If a source would deal damage to you or a creature you control, prevent 2 of that damage.

Femeref Healer

Temple of Triumph

This land enters tapped.
When this land enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.)
{T}: Add {R} or {W}.

Thought Vessel

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

Sol Ring

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Blaze

Paladin Class

(Gain the next level as a sorcery to add its ability.)
Spells your opponents cast during your turn cost {1} more to cast.
{2}{W}: Level 2
Creatures you control get +1/+1.
{4}{W}: Level 3
Whenever you attack, until end of turn, target attacking creature gets +1/+1 for each other attacking creature and gains double strike.

Abuna Acolyte

{T}: Prevent the next 1 damage that would be dealt to any target this turn.
{T}: Prevent the next 2 damage that would be dealt to target artifact creature this turn.

Alms Collector

Flash
If an opponent would draw two or more cards, instead you and that player each draw a card.

Plains

Cho-Manno, Revolutionary

Prevent all damage that would be dealt to Cho-Manno, Revolutionary.

Justice Strike

Target creature deals damage to itself equal to its power.

Ancient Amphitheater

As Ancient Amphitheater enters, you may reveal a Giant card from your hand. If you don't, Ancient Amphitheater enters tapped.
{T}: Add {R} or {W}.

Lava Coil

Lava Coil deals 4 damage to target creature. If that creature would die this turn, exile it instead.

Arcane Signet

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

Boros Fury-Shield

Prevent all combat damage that would be dealt by target attacking or blocking creature this turn. If {R} was spent to cast this spell, Boros Fury-Shield deals damage to that creature's controller equal to the creature's power.

Banefire

Banefire deals X damage to any target.
If X is 5 or more, this spell can't be countered and the damage can't be prevented.

Rem Karolus, Stalwart Slayer

Flying, haste
If a spell would deal damage to you or another permanent you control, prevent that damage.
If a spell would deal damage to an opponent or a permanent an opponent controls, it deals that much damage plus 1 instead.

Archivist of Oghma

Flash
Whenever an opponent searches their library, you gain 1 life and draw a card.

Daru Healer

{T}: Prevent the next 1 damage that would be dealt to any target this turn.
Morph {W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Soul Warden

Whenever another creature enters, you gain 1 life.

Aven Redeemer

Flying
{T}: Prevent the next 2 damage that would be dealt to any target this turn.

Master Healer

{T}: Prevent the next 4 damage that would be dealt to any target this turn.

D'Avenant Healer

{T}: D'Avenant Healer deals 1 damage to target attacking or blocking creature.
{T}: Prevent the next 1 damage that would be dealt to any target this turn.

Sanctum Custodian

Cleric Class

(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.

Stone Quarry

Stone Quarry enters tapped.
{T}: Add {R} or {W}.

Dawn Charm

Choose one —
• Prevent all combat damage that would be dealt this turn.
• Regenerate target creature.
• Counter target spell that targets you.

Boros Guildgate

This land enters tapped.
{T}: Add {R} or {W}.

Dawnfluke

Flash
When Dawnfluke enters, prevent the next 3 damage that would be dealt to any target this turn.
Evoke {W} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)

Wind-Scarred Crag

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

Shock

Battletide Alchemist

If a source would deal damage to a player, you may prevent X of that damage, where X is the number of Clerics you control.