Serene Steward

Whenever you gain life, you may pay {W}. If you do, put a +1/+1 counter on target creature.

Tar Snare

Target creature gets -3/-2 until end of turn.

You gain life equal to target creature's power. The next time that creature would deal damage this turn, prevent that damage.

{4}{W}: Creatures you control get +1/+1 until end of turn.

Cohort — {T}, Tap an untapped Ally you control: You gain 2 life.

Cohort — {T}, Tap an untapped Ally you control: Tap target creature.

Rally — Whenever Kor Entanglers or another Ally enters the battlefield under your control, tap target creature an opponent controls.

{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Create two 2/2 white Knight Ally creature tokens.

Destroy target creature with power 4 or greater.

Return up to two target creature cards from your graveyard to your hand.

Flying
Whenever you gain life, each opponent loses 1 life.

Gideon's Reproach deals 4 damage to target attacking or blocking creature.

Kor Scythemaster has first strike as long as it's attacking.

Cohort — {T}, Tap an untapped Ally you control: Target opponent loses 2 life.

Rally — Whenever Kalastria Healer or another Ally enters the battlefield under your control, each opponent loses 1 life and you gain 1 life.

Kor Castigator can't be blocked by Eldrazi Scions.

Cohort — {T}, Tap an untapped Ally you control: You draw a card and you lose 1 life.

Flying
Whenever Vampire Envoy becomes tapped, you gain 1 life.

Flying
At the beginning of your upkeep, each opponent loses 1 life and you gain 1 life.

Cohort — {T}, Tap an untapped Ally you control: Put a +1/+1 counter on each creature you control.

{T}: Add {C}.
{4}{B}, {T}, Sacrifice Blighted Fen: Target opponent sacrifices a creature.

Cohort — {T}, Tap an untapped Ally you control: Create a tapped 2/2 black Zombie creature token.