Whispersilk Cloak

Equipped creature can't be blocked and has shroud. (It can't be the target of spells or abilities.)
Equip {2}

Spirit of the Hearth

Flying
You have hexproof. (You can't be the target of spells or abilities your opponents control.)

Sunbeam Spellbomb

{W}, Sacrifice Sunbeam Spellbomb: You gain 5 life.
{1}, Sacrifice Sunbeam Spellbomb: Draw a card.

Soul of Theros

Vigilance
{4}{W}{W}: Creatures you control get +2/+2 and gain first strike and lifelink until end of turn.
{4}{W}{W}, Exile Soul of Theros from your graveyard: Creatures you control get +2/+2 and gain first strike and lifelink until end of turn.

Subjugator Angel

Flying
When Subjugator Angel enters, tap all creatures your opponents control.

Angel of Mercy

Flying
When Angel of Mercy enters, you gain 3 life.

Ballista Squad

{X}{W}, {T}: Ballista Squad deals X damage to target attacking or blocking creature.

Patron of the Kitsune

Fox offering (You may cast this spell any time you could cast an instant by sacrificing a Fox and paying the difference in mana costs between this and the sacrificed Fox. Mana cost includes color.)
Whenever a creature attacks, you may gain 1 life.

Ancestor's Chosen

First strike (This creature deals combat damage before creatures without first strike.)
When Ancestor's Chosen enters, you gain 1 life for each card in your graveyard.

Arrest

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.

Cradle of Vitality

Whenever you gain life, you may pay {1}{W}. If you do, put a +1/+1 counter on target creature for each 1 life you gained.

Celestial Force

At the beginning of each upkeep, you gain 3 life.

Silent Attendant

Gold Myr

Mass Calcify

Congregate

Target player gains 2 life for each creature on the battlefield.

Evra, Halcyon Witness

Lifelink
{4}: Exchange your life total with Evra, Halcyon Witness's power.

Martyr of Sands

{1}, Reveal X white cards from your hand, Sacrifice Martyr of Sands: You gain three times X life.

Dawnglare Invoker

Flying
{8}: Tap all creatures target player controls.

Honor's Reward

You gain 4 life. Bolster 2. (Choose a creature with the least toughness among creatures you control and put two +1/+1 counters on it.)

Spirit Loop

Enchant creature you control
Whenever enchanted creature deals damage, you gain that much life.
When Spirit Loop is put into a graveyard from the battlefield, return Spirit Loop to its owner's hand.

Chastise

Destroy target attacking creature. You gain life equal to its power.

Faithbearer Paladin

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Blessed Reversal

You gain 3 life for each creature attacking you.

Ajani's Pridemate

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

Celestial Crusader

Flash
Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
Flying
Other white creatures get +1/+1.

Ajani's Mantra

At the beginning of your upkeep, you may gain 1 life.

Blinding Light

Proper Burial

Whenever a creature you control dies, you gain life equal to that creature's toughness.

Lifecreed Duo

Flying
Whenever another creature you control enters, you gain 1 life.

Breath of Life

Return target creature card from your graveyard to the battlefield.

Well of Lost Dreams

Whenever you gain life, you may pay {X}, where X is less than or equal to the amount of life you gained. If you do, draw X cards.

Trigon of Mending

Trigon of Mending enters with three charge counters on it.
{W}{W}, {T}: Put a charge counter on Trigon of Mending.
{2}, {T}, Remove a charge counter from Trigon of Mending: Target player gains 3 life.

Courier Griffin

Flying
When Courier Griffin enters, you gain 2 life.

Blinding Mage

Plains

Griffin Aerie

At the beginning of your end step, if you gained 3 or more life this turn, create a 2/2 white Griffin creature token with flying.

Neck Snap

Destroy target attacking or blocking creature.

Noble Stand

Whenever a creature you control blocks, you gain 2 life.

Invoke the Divine

Destroy target artifact or enchantment. You gain 4 life.

Arashin Cleric

When Arashin Cleric enters, you gain 3 life.

Syndic of Tithes

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)

Fumigate

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

Skystreamer

Assist (Another player can pay up to {4} of this spell's cost.)
Flying
When Skystreamer enters, target player gains 4 life.

Renewed Faith

You gain 6 life.
Cycling {1}{W} ({1}{W}, Discard this card: Draw a card.)
When you cycle Renewed Faith, you may gain 2 life.

Staunch Defenders

When Staunch Defenders enters, you gain 4 life.

Serra Avatar

Serra Avatar's power and toughness are each equal to your life total.
When Serra Avatar is put into a graveyard from anywhere, shuffle it into its owner's library.

Angel's Feather

Whenever a player casts a white spell, you may gain 1 life.

Radiant Fountain

When Radiant Fountain enters, you gain 2 life.
{T}: Add {C}.

Storm Herd

Create X 1/1 white Pegasus creature tokens with flying, where X is your life total.

Nyx-Fleece Ram

At the beginning of your upkeep, you gain 1 life.

Archangel

Arcane Encyclopedia

Archon of Redemption

Flying
Whenever Archon of Redemption or another creature you control with flying enters, you may gain life equal to that creature's power.

Daxos, Blessed by the Sun

Daxos's toughness is equal to your devotion to white. (Each {W} in the mana costs of permanents you control counts toward your devotion to white.)
Whenever another creature you control enters or dies, you gain 1 life.

Rest for the Weary

Target player gains 4 life.
Landfall — If you had a land enter the battlefield under your control this turn, that player gains 8 life instead.

Purity

Flying
If noncombat damage would be dealt to you, prevent that damage. You gain life equal to the damage prevented this way.
When Purity is put into a graveyard from anywhere, shuffle it into its owner's library.

Dawn of Hope

Whenever you gain life, you may pay {2}. If you do, draw a card.
{3}{W}: Create a 1/1 white Soldier creature token with lifelink.

Noble Purpose

Whenever a creature you control deals combat damage, you gain that much life.

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.

Aven Cloudchaser

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Aven Cloudchaser enters, destroy target enchantment.

Divine Congregation

You gain 2 life for each creature target player controls.
Suspend 5—{1}{W} (Rather than cast this card from your hand, you may pay {1}{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.)

Nykthos Paragon

Whenever you gain life, you may put that many +1/+1 counters on each creature you control. Do this only once each turn.

Kemba's Skyguard

Flying
When Kemba's Skyguard enters, you gain 2 life.

Ancient Den

Boon Reflection

If you would gain life, you gain twice that much life instead.

Meditation Puzzle

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.)
You gain 8 life.