Akroan Mastiff

Battlefield Raptor

Alley Strangler

Soul's Attendant

Whenever another creature enters, you may gain 1 life.

Affa Protector

Aven Skirmisher

Ainok Bond-Kin

Outlast {1}{W} ({1}{W}, {T}: Put a +1/+1 counter on this creature. Outlast only as a sorcery.)
Each creature you control with a +1/+1 counter on it has first strike.

Blood Seeker

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

Aron, Benalia's Ruin

Menace (This creature can't be blocked except by two or more creatures.)
{W}{B}, {T}, Sacrifice another creature: Put a +1/+1 counter on each creature you control.

Argivian Phalanx

Affinity for creatures (This spell costs {1} less to cast for each creature you control.)
Vigilance (Attacking doesn't cause this creature to tap.)

Soul Warden

Whenever another creature enters, you gain 1 life.

Unruly Mob

Whenever another creature you control dies, put a +1/+1 counter on this creature.

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.

Ajani's Sunstriker

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

Angelic Wall

Defender (This creature can't attack.)
Flying

Deathgreeter

Whenever another creature dies, you may gain 1 life.

Alaborn Grenadier

Anointer of Valor

Flying
Whenever a creature attacks, you may pay {3}. When you do, put a +1/+1 counter on that creature.

Abyssal Gatekeeper

When this creature dies, each player sacrifices a creature of their choice.

Flaming Fist Officer

Whenever another creature you control leaves the battlefield, put a +1/+1 counter on this creature.

Akrasan Squire

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

Apex Hawks

Multikicker {1}{W} (You may pay an additional {1}{W} any number of times as you cast this spell.)
Flying
This creature enters with a +1/+1 counter on it for each time it was kicked.

Arashin Cleric

When this creature enters, you gain 3 life.

Abzan Skycaptain

Flying
When this creature dies, bolster 2. (Choose a creature with the least toughness among creatures you control and put two +1/+1 counters on it.)

Abbey Griffin

Guardian Kirin

Flying
Whenever another creature you control dies, put a +1/+1 counter on this creature.

Alabaster Host Sanctifier

Accursed Spirit

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Alabaster Kirin

Alpine Watchdog

Vigilance (Attacking doesn't cause this creature to tap.)

Plains

Gavony Unhallowed

Impassioned Orator

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

Ambush Gigapede

Flash
When this creature enters, target creature an opponent controls gets -2/-2 until end of turn.