Blood Researcher

Menace (This creature can't be blocked except by two or more creatures.)
Whenever you gain life, put a +1/+1 counter on this creature.

Goldenglow Moth

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

Marauding Blight-Priest

Whenever you gain life, each opponent loses 1 life.

Suture Priest

Whenever another creature you control enters, you may gain 1 life.
Whenever a creature an opponent controls enters, you may have that player lose 1 life.

Pride Guardian

Defender
Whenever this creature blocks, you gain 3 life.

Ajani's Mantra

At the beginning of your upkeep, you may gain 1 life.