Soul's Attendant

Whenever another creature enters, you may gain 1 life.

Profane Prayers

Profane Prayers deals X damage to any target and you gain X life, where X is the number of Clerics on the battlefield.

Doomskar Oracle

Whenever you cast your second spell each turn, you gain 2 life.
Foretell {W} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Marauding Blight-Priest

Whenever you gain life, each opponent loses 1 life.

Vile Deacon

Whenever this creature attacks, it gets +X/+X until end of turn, where X is the number of Clerics on the battlefield.

Pristine Talisman

Scholar of Athreos

{2}{B}: Each opponent loses 1 life. You gain life equal to the life lost this way.

Soul Warden

Whenever another creature enters, you gain 1 life.

Battlefield Medic

{T}: Prevent the next X damage that would be dealt to target creature this turn, where X is the number of Clerics on the battlefield.

Children of Korlis

Sacrifice this creature: You gain life equal to the life you've lost this turn. (Damage causes loss of life.)

Orzhov Locket

{T}: Add {W} or {B}.
{W/B}{W/B}{W/B}{W/B}, {T}, Sacrifice this artifact: Draw two cards.

Edgewalker

Cleric spells you cast cost {W}{B} less to cast. This effect reduces only the amount of colored mana you pay. (For example, if you cast a Cleric spell with mana cost {1}{W}, it costs {1} to cast.)

Obsidian Acolyte

Protection from black
{W}: Target creature gains protection from black until end of turn.