Splinterfright

Trample
Splinterfright's power and toughness are each equal to the number of creature cards in your graveyard.
At the beginning of your upkeep, mill two cards. (Put the top two cards of your library into your graveyard.)

Acidic Slime

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
When this creature enters, destroy target artifact, enchantment, or land.

Ambush Viper

Executioner's Hood

Equipped creature has intimidate. (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Boneyard Wurm

Boneyard Wurm's power and toughness are each equal to the number of creature cards in your graveyard.

Wreath of Geists

Enchant creature
Enchanted creature gets +X/+X, where X is the number of creature cards in your graveyard.

Ghoultree

This spell costs {1} less to cast for each creature card in your graveyard.

Forest

Tower Geist

Flying
When this creature enters, look at the top two cards of your library. Put one of them into your hand and the other into your graveyard.

Island

Gnaw to the Bone

You gain 2 life for each creature card in your graveyard.
Flashback {2}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Brindle Boar

Sacrifice this creature: You gain 4 life.

Armored Skaab

When this creature enters, mill four cards.

Hollowhenge Beast

Chasm Drake

Flying
Whenever this creature attacks, target creature you control gains flying until end of turn.

Tracker's Instincts

Reveal the top four cards of your library. Put a creature card from among them into your hand and the rest into your graveyard.
Flashback {2}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Alluring Siren

{T}: Target creature an opponent controls attacks you this turn if able.

Dawntreader Elk

{G}, Sacrifice this creature: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Aether Adept

When this creature enters, return target creature to its owner's hand.

Deranged Assistant

{T}, Mill a card: Add {C}. (To mill a card, put the top card of your library into your graveyard.)

Moon Heron

Grim Flowering

Draw a card for each creature card in your graveyard.

Mulch

Reveal the top four cards of your library. Put all land cards revealed this way into your hand and the rest into your graveyard.