Witch's Familiar

First Response

At the beginning of each upkeep, if you lost life last turn, create a 1/1 white Soldier creature token.

Geist of the Moors

Ajani's Pridemate

Whenever you gain life, put a +1/+1 counter on Ajani's Pridemate.

Accursed Spirit

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Child of Night

Swamp

Wall of Essence

Defender (This creature can't attack.)
Whenever this creature is dealt combat damage, you gain that much life.

Soulmender

Kinsbaile Skirmisher

When this creature enters, target creature gets +1/+1 until end of turn.

Sungrace Pegasus

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

Divine Favor

Enchant creature
When this Aura enters, you gain 3 life.
Enchanted creature gets +1/+3.

Shadowcloak Vampire

Pay 2 life: This creature gains flying until end of turn. (It can't be blocked except by creatures with flying or reach.)

Solemn Offering

Destroy target artifact or enchantment. You gain 4 life.

Staff of the Death Magus

Whenever you cast a black spell or a Swamp you control enters, you gain 1 life.

Plains

Ulcerate

Target creature gets -3/-3 until end of turn. You lose 3 life.

Sign in Blood

Target player draws two cards and loses 2 life.

Tireless Missionaries

When this creature enters, you gain 3 life.

Crippling Blight

Enchant creature
Enchanted creature gets -1/-1 and can't block.

Blood Host

{1}{B}, Sacrifice another creature: Put a +1/+1 counter on this creature and you gain 2 life.

Pillar of Light

Exile target creature with toughness 4 or greater.

Wall of Limbs

Defender (This creature can't attack.)
Whenever you gain life, put a +1/+1 counter on this creature.
{5}{B}{B}, Sacrifice this creature: Target player loses X life, where X is this creature's power.