Diabolic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Severed Legion

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

Terror

Destroy target nonartifact, nonblack creature. It can't be regenerated.

Gravedigger

When Gravedigger enters, you may return target creature card from your graveyard to your hand.

Scathe Zombies

Spineless Thug

Drudge Skeletons

{B}: Regenerate Drudge Skeletons. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Dross Crocodile

Swamp

Looming Shade

{B}: Looming Shade gets +1/+1 until end of turn.

Assassinate

Unholy Strength

Enchant creature
Enchanted creature gets +2/+1.

Festering Goblin

When Festering Goblin dies, target creature gets -1/-1 until end of turn.

Recover

Return target creature card from your graveyard to your hand.
Draw a card.