Angel's Feather

Whenever a player casts a white spell, you may gain 1 life.

Kor Firewalker

Protection from red
Whenever a player casts a red spell, you may gain 1 life.

Wurm's Tooth

Whenever a player casts a green spell, you may gain 1 life.

Warmth

Whenever an opponent casts a red spell, you gain 2 life.

Urza's Chalice

Whenever a player casts an artifact spell, you may pay {1}. If you do, you gain 1 life.

Dragon's Claw

Whenever a player casts a red spell, you may gain 1 life.

Apothecary Initiate

Whenever a player casts a white spell, you may pay {1}. If you do, you gain 1 life.

Throne of Bone

Whenever a player casts a black spell, you may pay {1}. If you do, you gain 1 life.

Crystal Rod

Whenever a player casts a blue spell, you may pay {1}. If you do, you gain 1 life.

The Gaffer

At the beginning of each end step, if you gained 3 or more life this turn, draw a card.

Wooden Sphere

Whenever a player casts a green spell, you may pay {1}. If you do, you gain 1 life.

Demon's Horn

Whenever a player casts a black spell, you may gain 1 life.

Iron Star

Whenever a player casts a red spell, you may pay {1}. If you do, you gain 1 life.

Soldier of the Pantheon

Protection from multicolored
Whenever an opponent casts a multicolored spell, you gain 1 life.

Rewards of Diversity

Whenever an opponent casts a multicolored spell, you gain 4 life.

Soul's Attendant

Whenever another creature enters, you may gain 1 life.

Kraken's Eye

Whenever a player casts a blue spell, you may gain 1 life.

Jeweled Torque

As Jeweled Torque enters, choose a color.
Whenever a player casts a spell of the chosen color, you may pay {2}. If you do, you gain 2 life.

Auriok Champion

Protection from black and from red
Whenever another creature enters, you may gain 1 life.

Golem's Heart

Whenever a player casts an artifact spell, you may gain 1 life.

Peace of Mind

Soul Warden

Whenever another creature enters, you gain 1 life.

Sunscorch Regent

Flying
Whenever an opponent casts a spell, put a +1/+1 counter on Sunscorch Regent and you gain 1 life.

Paradise Plume

As Paradise Plume enters, choose a color.
Whenever a player casts a spell of the chosen color, you may gain 1 life.
{T}: Add one mana of the chosen color.

Shattered Angel

Flying
Whenever a land an opponent controls enters, you may gain 3 life.

Celestial Force

At the beginning of each upkeep, you gain 3 life.

Ivory Cup

Prism Ring

As Prism Ring enters, choose a color.
Whenever you cast a spell of the chosen color, you gain 1 life.

Sanctify

Destroy target artifact or enchantment. You gain 3 life.

Cleric Class

(Gain the next level as a sorcery to add its ability.)
If you would gain life, you gain that much life plus 1 instead.
{3}{W}: Level 2
Whenever you gain life, put a +1/+1 counter on target creature you control.
{4}{W}: Level 3
When this Class becomes level 3, return target creature card from your graveyard to the battlefield. You gain life equal to that creature's toughness.