Malakir Cullblade

When this creature enters, each opponent creates a 1/1 white Human creature token.

Whenever a creature an opponent controls dies, put a +1/+1 counter on this creature.

Enchant creature

Enchanted creature has lifelink and "Whenever a creature an opponent controls dies, put a +1/+1 counter on this creature." (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)

Menace

Ward—Discard a card.

Whenever this creature attacks, put a +1/+1 counter on target creature an opponent controls.

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

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

Shadow (This creature can block or be blocked by only creatures with shadow.)

Whenever a creature with shadow dies, put a +1/+1 counter on this creature.