Ambush Gigapede

Flash
When Ambush Gigapede enters the battlefield, target creature an opponent controls gets -2/-2 until end of turn.

Battlefield Raptor

Accursed Spirit

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

Alley Strangler

Blood Seeker

Whenever a creature enters the battlefield under an opponent's control, you may have that player lose 1 life.

Affa Protector

Arashin Cleric

When Arashin Cleric enters the battlefield, you gain 3 life.

Alaborn Grenadier

Alabaster Kirin

Plains

Alabaster Host Sanctifier

Unruly Mob

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

Argivian Phalanx

This spell costs {1} less to cast for each creature you control.
Vigilance

Soul's Attendant

Whenever another creature enters the battlefield, you may gain 1 life.

Impassioned Orator

Whenever another creature enters the battlefield under your control, you gain 1 life.

Flaming Fist Officer

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

Gavony Unhallowed

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

Apex Hawks

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

Ajani's Sunstriker

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

Aven Skirmisher

Abbey Griffin

Angelic Wall

Defender (This creature can't attack.)
Flying

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.

Soul Warden

Whenever another creature enters the battlefield, you gain 1 life.

Anointer of Valor

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

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.

Deathgreeter

Whenever another creature dies, you may gain 1 life.

Abyssal Gatekeeper

When Abyssal Gatekeeper dies, each player sacrifices a creature.

Akroan Mastiff

Alpine Watchdog

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

Swamp

Abzan Skycaptain

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

Suture Priest

Whenever another creature enters the battlefield under your control, you may gain 1 life.
Whenever a creature enters the battlefield under an opponent's control, you may have that player lose 1 life.

Guardian Kirin

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

Akrasan Squire

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