Aven Gagglemaster

Flying
When Aven Gagglemaster enters, you gain 2 life for each creature you control with flying.

Impassioned Orator

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

Goldnight Redeemer

Flying
When Goldnight Redeemer enters, you gain 2 life for each other creature you control.

Speakeasy Server

Flying
When Speakeasy Server enters, you gain 1 life for each other creature you control.

Elite Guardmage

Flying
When Elite Guardmage enters, you gain 3 life and draw a card.

Glacial Fortress

Glacial Fortress enters tapped unless you control a Plains or an Island.
{T}: Add {W} or {U}.

Wayfarer's Bauble

{2}, {T}, Sacrifice Wayfarer's Bauble: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Angel of Renewal

Flying
When Angel of Renewal enters, you gain 1 life for each creature you control.

Cloudblazer

Flying
When this creature enters, you gain 2 life and draw two cards.

Airdrop Aeronauts

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

Inspiring Overseer

Flying
When this creature enters, you gain 1 life and draw a card.

Prairie Stream

({T}: Add {W} or {U}.)
Prairie Stream enters tapped unless you control two or more basic lands.

Circuit Mender

When Circuit Mender enters, you gain 2 life.
When Circuit Mender leaves the battlefield, draw a card.

Counterspell

Aven of Enduring Hope

Flying
When Aven of Enduring Hope enters, you gain 3 life.

Angelic Chorus

Whenever a creature you control enters, you gain life equal to its toughness.

Azorius Signet

Aerial Assault

Destroy target tapped creature. You gain 1 life for each creature you control with flying.

Glorious Enforcer

Flying, lifelink
At the beginning of each combat, if you have more life than an opponent, Glorious Enforcer gains double strike until end of turn.

Blessed Reversal

You gain 3 life for each creature attacking you.

Sunbond

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

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.

Island

Sejiri Refuge

Sejiri Refuge enters tapped.
When Sejiri Refuge enters, you gain 1 life.
{T}: Add {W} or {U}.

Hinder

Counter target spell. If that spell is countered this way, put that card on your choice of the top or bottom of its owner's library instead of into that player's graveyard.

Soul Warden

Whenever another creature enters, you gain 1 life.

Arcane Denial

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.

Angel of Mercy

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

Luminous Phantom

Flying
Whenever another creature you control leaves the battlefield, you gain 1 life.
If Luminous Phantom would be put into a graveyard from anywhere, exile it instead.

Lunarch Veteran

Whenever another creature you control enters, you gain 1 life.
Disturb {1}{W} (You may cast this card from your graveyard transformed for its disturb cost.)

Lunarch Veteran // Luminous Phantom

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.

Yorion, Sky Nomad

Companion — Your starting deck contains at least twenty cards more than the minimum deck size. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.)
Flying
When Yorion enters, exile any number of other nonland permanents you own and control. Return those cards to the battlefield at the beginning of the next end step.

Plains

Ajani's Welcome

Whenever a creature you control enters, you gain 1 life.

Azorius Cluestone

{T}: Add {W} or {U}.
{W}{U}, {T}, Sacrifice Azorius Cluestone: Draw a card.

Aven Battle Priest

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Aven Battle Priest enters, you gain 3 life.

Dawning Angel

Flying
When Dawning Angel enters, you gain 4 life.

Port Town

As Port Town enters, you may reveal a Plains or Island card from your hand. If you don't, Port Town enters tapped.
{T}: Add {W} or {U}.

Hedron Archive

{T}: Add {C}{C}.
{2}, {T}, Sacrifice this artifact: Draw two cards.

Courier Griffin

Flying
When Courier Griffin enters, you gain 2 life.

Arcane Signet

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

Drogskol Reaver

Flying
Double strike (This creature deals both first-strike and regular combat damage.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)
Whenever you gain life, draw a card.

Filigree Angel

Flying
When Filigree Angel enters, you gain 3 life for each artifact you control.

Command Tower

Suture Priest

Whenever another creature you control enters, you may gain 1 life.
Whenever a creature an opponent controls enters, you may have that player lose 1 life.

Ajani's Pridemate

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

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.

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.

Soul's Attendant

Whenever another creature enters, you may gain 1 life.

Twinblade Paladin

Whenever you gain life, put a +1/+1 counter on this creature.
As long as you have 25 or more life, this creature has double strike. (It deals both first-strike and regular combat damage.)

Riot Control

You gain 1 life for each creature your opponents control. Prevent all damage that would be dealt to you this turn.

Skystreamer

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

Coveted Jewel

When Coveted Jewel enters, draw three cards.
{T}: Add three mana of any one color.
Whenever one or more creatures an opponent controls attack you and aren't blocked, that player draws three cards and gains control of Coveted Jewel. Untap it.

Negate

Oji, the Exquisite Blade

When Oji, the Exquisite Blade enters, you gain 2 life and scry 2.
Whenever you cast your second spell each turn, exile up to one target creature you control, then return it to the battlefield under its owner's control.

Sphinx's Revelation

Gilded Lotus

Unwind

Counter target noncreature spell. Untap up to three lands.

Shepherd of Heroes

Flying
When Shepherd of Heroes enters, you gain 2 life for each creature in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

Light of Promise

Rewind

Counter target spell. Untap up to four lands.

Absorb

Kemba's Skyguard

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

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.

Commander's Sphere

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

Mind Stone

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

Sol Ring

Azorius Charm

Choose one —
• Creatures you control gain lifelink until end of turn.
• Draw a card.
• Put target attacking or blocking creature on top of its owner's library.

Celestial Unicorn

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

Righteous Cause

Whenever a creature attacks, you gain 1 life.

Voice of the Blessed

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.

Fumigate

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

Remove Soul

Aven Riftwatcher

Flying
Vanishing 3 (This creature enters with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
When Aven Riftwatcher enters or leaves the battlefield, you gain 2 life.