Blood Scrivener

If you would draw a card while you have no cards in hand, instead you draw two cards and you lose 1 life.

Abyssal Gatekeeper

When Abyssal Gatekeeper dies, each player sacrifices a creature of their choice.

Fungal Infection

Target creature gets -1/-1 until end of turn. Create a 1/1 green Saproling creature token.

Necrotic Wound

Undergrowth — Target creature gets -X/-X until end of turn, where X is the number of creature cards in your graveyard. If that creature would die this turn, exile it instead.

Swamp

Typhoid Rats

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

Graveyard Marshal

{2}{B}, Exile a creature card from your graveyard: Create a tapped 2/2 black Zombie creature token.

Vicious Conquistador

Whenever Vicious Conquistador attacks, each opponent loses 1 life.

Raise Dead

Return target creature card from your graveyard to your hand.

Burglar Rat

When Burglar Rat enters, each opponent discards a card.

Merciless Executioner

When Merciless Executioner enters, each player sacrifices a creature of their choice.

Bile Blight

Target creature and all other creatures with the same name as that creature get -3/-3 until end of turn.