Ancestor Dragon

Flying
Whenever one or more creatures you control attack, you gain 1 life for each attacking creature.

Plains

Bishop's Soldier

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

Prayer of Binding

Flash
When this enchantment enters, exile up to one target nonland permanent an opponent controls until this enchantment leaves the battlefield. You gain 2 life.

Adamant Will

Target creature gets +2/+2 and gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Herald of Faith

Flying
Whenever this creature attacks, you gain 2 life.

Deadly Riposte

Deadly Riposte deals 3 damage to target tapped creature and you gain 2 life.

Twinblade Paladin

Whenever you gain life, put a +1/+1 counter on this creature.
As long as you have 25 or more life, this creature has double strike. (It deals both first-strike and regular combat damage.)

Uncharted Haven

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

Hinterland Sanctifier

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

Quick-Draw Katana

During your turn, equipped creature gets +2/+0 and has first strike. (It deals combat damage before creatures without first strike.)
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Dazzling Angel

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

Inspiring Overseer

Flying
When this creature enters, you gain 1 life and draw a card.

Ajani's Pridemate

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