Hinterland Sanctifier

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

Qala, Ajani's Pridemate

Whenever Qala attacks, other attacking creatures you control get +X/+0 until end of turn, where X is the number of counters on Qala.
Whenever you gain life, put a +1/+1 counter on Qala.
{3}{W}: You gain 1 life.

Kabira Crossroads

This land enters tapped.
When this land enters, you gain 2 life.
{T}: Add {W}.

Faith's Fetters

Enchant permanent
When this Aura enters, you gain 4 life.
Enchanted permanent can't attack or block, and its activated abilities can't be activated unless they're mana abilities.

Divine Arrow

Divine Arrow deals 4 damage to target attacking or blocking creature.

Mesa Unicorn

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

Thriving Heath

This land enters tapped. As it enters, choose a color other than white.
{T}: Add {W} or one mana of the chosen color.

Speaker of the Heavens

Vigilance, lifelink (Attacking doesn't cause this creature to tap. Damage dealt by this creature also causes you to gain that much life.)
{T}: Create a 4/4 white Angel creature token with flying. Activate only if you have at least 7 life more than your starting life total and only as a sorcery.

Revitalize

Brightmare

When this creature enters, tap up to one target creature. You gain life equal to that creature's power.

Angel of Vitality

Flying
If you would gain life, you gain that much life plus 1 instead.
This creature gets +2/+2 as long as you have 25 or more life.

Plains

Ajani's Pridemate

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

Angel of Mercy

Flying
When this creature enters, you gain 3 life.

Desperate Lunge

Target creature gets +2/+2 and gains flying until end of turn. You gain 2 life.