Deathgreeter

Whenever another creature dies, you may gain 1 life.

Spidersilk Net

Equipped creature gets +0/+2 and has reach. (It can block creatures with flying.)
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Soul Net

Whenever a creature dies, you may pay {1}. If you do, you gain 1 life.

Reassembling Skeleton

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

Grim Backwoods

{T}: Add {C}.
{2}{B}{G}, {T}, Sacrifice a creature: Draw a card.

Warpath Ghoul

Forest

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.

Devouring Swarm

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

Swamp

Doom Blade

Savra, Queen of the Golgari

Whenever you sacrifice a black creature, you may pay 2 life. If you do, each other player sacrifices a creature of their choice.
Whenever you sacrifice a green creature, you may gain 2 life.

Naturalize

Rampant Growth

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

Dead Weight

Enchant creature
Enchanted creature gets -2/-2.

Windstorm

Windstorm deals X damage to each creature with flying.

Hell's Caretaker

{T}, Sacrifice a creature: Return target creature card from your graveyard to the battlefield. Activate only during your upkeep.

Ezuri's Archers

Reach (This creature can block creatures with flying.)
Whenever Ezuri's Archers blocks a creature with flying, Ezuri's Archers gets +3/+0 until end of turn.

Ambush Viper

Make a Wish

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

Disciple of Griselbrand

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

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.

Skulltap

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

Prey Upon

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

Demonmail Hauberk

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

One-Eyed Scarecrow

Defender
Creatures with flying your opponents control get -1/-0.

Somberwald Spider

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

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 Lumberknot.

Woodland Sleuth

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

Hollowhenge Scavenger

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

Morkrut Banshee

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

Altar's Reap

Festerhide Boar

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

Plummet

Typhoid Rats

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