Soul Warden

Whenever another creature enters, you gain 1 life.

Healer's Hawk

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

Queen's Commission

Create two 1/1 white Vampire creature tokens with lifelink.

Patrician's Scorn

If you've cast another white spell this turn, you may cast this spell without paying its mana cost.
Destroy all enchantments.

Sworn Companions

Create two 1/1 white Soldier creature tokens with lifelink.

Plains

Heron of Hope

Flying
If you would gain life, you gain that much life plus 1 instead.
{1}{W}: Heron of Hope gains lifelink until end of turn.

Sacred Cat

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

Ajani's Sunstriker

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

Steadfast Paladin

Beloved Princess

Lifelink
Beloved Princess can't be blocked by creatures with power 3 or greater.

Guardians' Pledge

White creatures you control get +2/+2 until end of turn.

Mesa Unicorn

Soul's Attendant

Whenever another creature enters, you may gain 1 life.

Alabaster Host Sanctifier

Celestial Unicorn

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

Righteous Charge

Creatures you control get +2/+2 until end of turn.

Story Seeker

Bishop's Soldier

Charmed Stray

Lifelink
When Charmed Stray enters, put a +1/+1 counter on each other creature you control named Charmed Stray.