Spirit Link

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Whenever enchanted creature deals damage, you gain that much life.

Spirit Mantle

Enchant creature
Enchanted creature gets +1/+1 and has protection from creatures.

Light of Promise

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

Holy Mantle

Enchant creature
Enchanted creature gets +2/+2 and has protection from creatures.

Healer's Hawk

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

Plains

Dazzling Reflection

You gain life equal to target creature's power. The next time that creature would deal damage this turn, prevent that damage.

Ajani's Pridemate

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

Cathedral Sanctifier

When Cathedral Sanctifier enters, you gain 3 life.