Moldervine Reclamation

Whenever a creature you control dies, you gain 1 life and draw a card.

Blight Mound

Attacking Pests you control get +1/+0 and have menace.
Whenever a nontoken creature you control dies, create a 1/1 black and green Pest creature token with "When this creature dies, you gain 1 life."

Death's Presence

Whenever a creature you control dies, put X +1/+1 counters on target creature you control, where X is the power of the creature that died.

Xira, the Golden Sting

Flying, haste
Whenever Xira, the Golden Sting attacks, put an egg counter on another target creature without an egg counter on it. When that creature dies, if it has an egg counter on it, draw a card and create a 1/1 black Insect creature token with flying.

Xira Arien

Flying
{B}{R}{G}, {T}: Target player draws a card.

Dark Prophecy

Whenever a creature you control dies, you draw a card and you lose 1 life.