Rakdos Carnarium

This land enters tapped.
When this land enters, return a land you control to its owner's hand.
{T}: Add {B}{R}.

Rakdos Guildgate

This land enters tapped.
{T}: Add {B} or {R}.

Bone Splinters

As an additional cost to cast this spell, sacrifice a creature.
Destroy target creature.

Goblin Arsonist

When this creature dies, you may have it deal 1 damage to any target.

Mountain

Swamp

Sadistic Glee

Enchant creature
Whenever a creature dies, put a +1/+1 counter on enchanted creature.

Perilous Myr

When this creature dies, it deals 2 damage to any target.

Bloodfell Caves

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {B} or {R}.

Serrated Scorpion

When this creature dies, it deals 2 damage to each opponent and you gain 2 life.

Orcish Hellraiser

Echo {R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature dies, it deals 2 damage to target player or planeswalker.

Scorched Rusalka

{R}, Sacrifice a creature: This creature deals 1 damage to target player or planeswalker.

Mortician Beetle

Whenever a player sacrifices a creature, you may put a +1/+1 counter on this creature.

Body Dropper

Whenever you sacrifice another creature, put a +1/+1 counter on this creature.
{B}{R}, Sacrifice another creature: This creature gains menace until end of turn. (It can't be blocked except by two or more creatures.)