Revenge

Double your life total. Target opponent loses half their life, rounded up.

Revival

Return target creature card with mana value 3 or less from your graveyard to the battlefield.

Flying, double strike, lifelink
Whenever you gain life, draw a card.

Whenever a creature enters the battlefield under your control, you gain life equal to its toughness.

Creatures you control have double strike and lifelink.

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

Defender, flying
At the beginning of your end step, you may gain life equal to the power of target creature you control.

Each opponent loses two times X life. You gain life equal to the life lost this way.

Whenever you gain life, you may put that many +1/+1 counters on each creature you control. Do this only once each turn.