Firebreathing

Enchant creature
{R}: Enchanted creature gets +1/+0 until end of turn.

Swamp

Fire Elemental

Murder

Mons's Goblin Raiders

Dark Ritual

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Unholy Strength

Enchant creature
Enchanted creature gets +2/+1.

Drudge Skeletons

{B}: Regenerate Drudge Skeletons. (The next time this creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)

Mountain

Grave Peril

When a nonblack creature enters, sacrifice Grave Peril. If you do, destroy that creature.

Terror

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

Erg Raiders

At the beginning of your end step, if Erg Raiders didn't attack this turn, Erg Raiders deals 2 damage to you unless it came under your control this turn.