Lumberknot

Hexproof (This creature can't be the target of spells or abilities your opponents control.)
Whenever a creature dies, put a +1/+1 counter on this creature.

Moldgraf Monstrosity

Trample
When this creature dies, exile it, then return two creature cards at random from your graveyard to the battlefield.

Disciple of Griselbrand

{1}, Sacrifice a creature: You gain life equal to the sacrificed creature's toughness.

Prey Upon

Target creature you control fights target creature you don't control. (Each deals damage equal to its power to the other.)

Caravan Vigil

Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Morbid — You may put that card onto the battlefield instead of putting it into your hand if a creature died this turn.

Naturalize

Somberwald Spider

Reach (This creature can block creatures with flying.)
Morbid — This creature enters with two +1/+1 counters on it if a creature died this turn.

Demonmail Hauberk

Equipped creature gets +4/+2.
Equip—Sacrifice a creature.

Dead Weight

Enchant creature
Enchanted creature gets -2/-2.

Typhoid Rats

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Hollowhenge Scavenger

Morbid — When this creature enters, if a creature died this turn, you gain 5 life.

Devouring Swarm

Flying
Sacrifice a creature: This creature gets +1/+1 until end of turn.

Make a Wish

Return two cards at random from your graveyard to your hand.

Forest

Swamp

Woodland Sleuth

Morbid — When this creature enters, if a creature died this turn, return a creature card at random from your graveyard to your hand.

Warpath Ghoul

Morkrut Banshee

Morbid — When this creature enters, if a creature died this turn, target creature gets -4/-4 until end of turn.

Doom Blade

Reassembling Skeleton

{1}{B}: Return this card from your graveyard to the battlefield tapped.

Skirsdag High Priest

Morbid — {T}, Tap two untapped creatures you control: Create a 5/5 black Demon creature token with flying. Activate only if a creature died this turn.

Altar's Reap

As an additional cost to cast this spell, sacrifice a creature.
Draw two cards.

Rampant Growth

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Ambush Viper

Festerhide Boar

Trample
Morbid — This creature enters with two +1/+1 counters on it if a creature died this turn.

Brain Weevil

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)
Sacrifice this creature: Target player discards two cards. Activate only as a sorcery.