Whenever you gain life, put that many +1/+1 counters on Ageless Entity.

+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."

+2: Reveal the top three cards of your library. Put all nonland permanent cards revealed this way into your hand and the rest on the bottom of your library in any order.

-2: Exile target creature. Its controller gains life equal to its power.

-9: Put five +1/+1 counters on each creature you control and five loyalty counters on each other planeswalker you control.

Whenever an enchantment enters the battlefield under your control, create a 2/2 white Cat creature token. If that enchantment is an Aura, you may attach it to the token.

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

Whenever a creature enters the battlefield under your control, you gain 1 life.

+2: Put two +1/+1 counters on up to one target creature.

+1: Reveal cards from the top of your library until you reveal a creature card. Put that card into your hand and the rest on the bottom of your library in a random order.

-11: Put X +1/+1 counters on target creature, where X is your life total. That creature gains trample until end of turn.

Create a 3/3 green Centaur creature token.

Fuse (You may cast one or both halves of this card from your hand.)

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You gain 2 life for each creature you control.

Fuse (You may cast one or both halves of this card from your hand.)

Flying, vigilance, lifelink

Fabricate 2 (When this creature enters the battlefield, put two +1/+1 counters on it or create two 1/1 colorless Servo artifact creature tokens.)

Other creatures you control get +1/+1.

Whenever a creature enters the battlefield under your control, you gain life equal to its toughness.

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.

Whenever a creature token enters the battlefield under your control, you gain 1 life.

Embalm {3}{W} ({3}{W}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a white Zombie Human Cleric with no mana cost. Embalm only as a sorcery.)

Protection from black and from red

Whenever another creature enters the battlefield, you may gain 1 life.

Creatures your opponents control enter the battlefield tapped.

Whenever a creature enters the battlefield under an opponent's control, you gain 1 life.

Flying

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

Whenever a creature you control attacks alone, it gains lifelink until end of turn.

You gain 1 life for each creature on the battlefield. Prevent all combat damage that would be dealt this turn.

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.)

Prevent all damage that would be dealt by creatures this turn. You gain life equal to the damage prevented this way.

Play with the top card of your library revealed.

You may play lands from the top of your library.

Landfall -- Whenever a land enters the battlefield under your control, you gain 1 life.

First strike, vigilance, lifelink

Aura and Equipment spells you cast cost {1} less to cast.

If one or more creature tokens would be created under your control, that many 4/4 white Angel creature tokens with flying and vigilance are created instead.

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.

If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead.

This spell can't be countered.

Flying, lifelink

Your opponents can't cast spells during your turn.

{2}, {T}: Reveal the top card of your library. If it's a creature card, create a 1/1 green Saproling creature token. If it's a land card, put that card onto the battlefield under your control. If it's a noncreature, nonland card, you gain 2 life.

Enchant creature

Enchanted creature has "{1}{W}, {T}: You gain 3 life."

Enchant permanent

When Faith's Fetters enters the battlefield, you gain 4 life.

Enchanted permanent can't attack or block, and its activated abilities can't be activated unless they're mana abilities.

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

{3}, Sacrifice Fountain of Renewal: Draw a card.

Flying, first strike, lifelink

At the beginning of your end step, if you both own and control Gisela, the Broken Blade and a creature named Bruna, the Fading Light, exile them, then meld them into Brisela, Voice of Nightmares.

Defender

Landfall -- Whenever a land enters the battlefield under your control, you gain 1 life.

If Leyline of Vitality is in your opening hand, you may begin the game with it on the battlefield.

Creatures you control get +0/+1.

Whenever a creature enters the battlefield under your control, you may gain 1 life.

You gain 4 life. If a creature died this turn, you gain 8 life instead.

Equipped creature gets +3/+0 and has trample and lifelink.

Equip {3}

Destroy target artifact or enchantment with mana value X. It can't be regenerated. You gain X life.

Destroy target artifact or enchantment. You gain 3 life.

+3: You gain 3 life.

-4: Reveal the top two cards of your library. Put all land cards from among them onto the battlefield and the rest into your hand.

-12: Creatures you control get +5/+5 and gain trample until end of turn.

You may exile a green card with mana value X from your hand rather than pay this spell's mana cost.

You gain X life.

White creature spells you cast cost {1} less to cast.

Whenever you cast a creature spell, create a 1/1 white Warrior creature token with vigilance.

Inspired -- Whenever Oreskos Sun Guide becomes untapped, you gain 2 life.

Defender

Whenever a creature you control with defender blocks, you may gain 2 life.

Defender

Whenever Pride Guardian blocks, you gain 3 life.

Return target creature or land card from a graveyard to its owner's hand. You gain 6 life.

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.

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.

{G}: Exile target card from a graveyard. If it was a creature card, put a +1/+1 counter on Scavenging Ooze and you gain 1 life.

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

Shield Mare can't be blocked by red creatures.

When Shield Mare enters the battlefield or becomes the target of a spell or ability an opponent controls, you gain 3 life.

Destroy target artifact or enchantment. You gain 4 life.

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.

Enchant creature

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

As Tablet of the Guilds enters the battlefield, choose two colors.

Whenever you cast a spell, if it's at least one of the chosen colors, you gain 1 life for each of the chosen colors it is.

You gain 1 life for each tapped artifact, creature, and land you control.

Whenever Verdant Sun's Avatar or another creature enters the battlefield under your control, you gain life equal to that creature's toughness.

Whenever a creature you control dies, you may pay {X}. If you do, you gain X life.

You gain life equal to the number of creatures on the battlefield plus the number of artifacts on the battlefield.

{T}, Pay 1 life, Sacrifice Windswept Heath: Search your library for a Forest or Plains card, put it onto the battlefield, then shuffle.