Soul Warden

Whenever another creature enters, you gain 1 life.

Pride Guardian

Defender
Whenever this creature blocks, you gain 3 life.

Blossoming Sands

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {G} or {W}.

Snake Umbra

Enchant creature
Enchanted creature gets +1/+1 and has "Whenever this creature deals damage to an opponent, you may draw a card."
Umbra armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)

Jaddi Offshoot

Defender
Landfall — Whenever a land you control enters, you gain 1 life.

Goldenglow Moth

Flying
Whenever this creature blocks, you may gain 4 life.

Soul's Attendant

Whenever another creature enters, you may gain 1 life.

Forest

Essence Warden

Cathedral Sanctifier

When this creature enters, you gain 3 life.

Wall of Hope

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

Celestial Unicorn

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

Campfire

{1}, {T}: You gain 2 life.
{2}, {T}, Exile this artifact: Put all commanders you own from the command zone and from your graveyard into your hand. Then shuffle your graveyard into your library.