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.

Scent of Jasmine

Reveal any number of white cards in your hand. You gain 2 life for each card revealed this way.

Ajani's Pridemate

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

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.

Zuran Orb

Wall of Hope

Defender (This creature can't attack.)
Whenever Wall of Hope is dealt damage, you gain that much life.

Soul Warden

Whenever another creature enters, you gain 1 life.

Nomad Stadium

{T}: Add {W}. Nomad Stadium deals 1 damage to you.
Threshold — {W}, {T}, Sacrifice Nomad Stadium: You gain 4 life. Activate only if seven or more cards are in your graveyard.

Words of Worship

{1}: The next time you would draw a card this turn, you gain 5 life instead.

Blessed Reversal

You gain 3 life for each creature attacking you.

Martyr of Sands

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

Eye of Vecna

When Eye of Vecna enters, you draw a card and you lose 2 life.
At the beginning of your upkeep, you may pay {2}. If you do, you draw a card and you lose 2 life.

Wall of Reverence

Defender, flying
At the beginning of your end step, you may gain life equal to the power of target creature you control.

Plains

Serene Steward

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