Phthisis

Destroy target creature. Its controller loses life equal to its power plus its toughness.
Suspend 5—{1}{B} (Rather than cast this card from your hand, you may pay {1}{B} and exile it with five time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost.)

Firescreamer

{R}: Firescreamer gets +1/+0 until end of turn.

Vicious Kavu

Whenever Vicious Kavu attacks, it gets +2/+0 until end of turn.

Addle

Choose a color. Target player reveals their hand and you choose a card of that color from it. That player discards that card.

Halam Djinn

Haste
Halam Djinn gets -2/-2 as long as red is the most common color among all permanents or is tied for most common.

Rakdos Carnarium

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

Phyrexian Reaper

Whenever Phyrexian Reaper becomes blocked by a green creature, destroy that creature. It can't be regenerated.

Cinder Shade

{B}: Cinder Shade gets +1/+1 until end of turn.
{R}, Sacrifice Cinder Shade: It deals damage equal to its power to target creature.

Mountain

Shivan Zombie

Rolling Thunder

Rolling Thunder deals X damage divided as you choose among any number of targets.

Soul Burn

Spend only black and/or red mana on X.
Soul Burn deals X damage to any target. You gain life equal to the damage dealt, but not more than the amount of {B} spent on X, the player's life total before the damage was dealt, the planeswalker's loyalty before the damage was dealt, or the creature's toughness.

Agonizing Demise

Kicker {1}{R} (You may pay an additional {1}{R} as you cast this spell.)
Destroy target nonblack creature. It can't be regenerated. If this spell was kicked, Agonizing Demise deals damage equal to that creature's power to the creature's controller.

Ghitu Fire

You may cast Ghitu Fire as though it had flash if you pay {2} more to cast it. (You may cast it any time you could cast an instant.)
Ghitu Fire deals X damage to any target.

Phyrexian Delver

When Phyrexian Delver enters, return target creature card from your graveyard to the battlefield. You lose life equal to that card's mana value.

Threaten

Untap target creature and gain control of it until end of turn. That creature gains haste until end of turn. (It can attack and {T} this turn.)

Phyrexian Slayer

Flying
Whenever Phyrexian Slayer becomes blocked by a white creature, destroy that creature. It can't be regenerated.

Cauldron Dance

Cast this spell only during combat.
Return target creature card from your graveyard to the battlefield. That creature gains haste. Return it to your hand at the beginning of the next end step.
You may put a creature card from your hand onto the battlefield. That creature gains haste. Its controller sacrifices it at the beginning of the next end step.

Swamp

Hooded Kavu

{B}: Hooded Kavu gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Tor Wauki

{T}: Tor Wauki deals 2 damage to target attacking or blocking creature.

Rakdos Signet

Thunderscape Apprentice

{B}, {T}: Target player loses 1 life.
{G}, {T}: Target creature gets +1/+1 until end of turn.

Bone Harvest

Put any number of target creature cards from your graveyard on top of your library.
Draw a card at the beginning of the next turn's upkeep.

Trench Wurm

{2}{R}, {T}: Destroy target nonbasic land.

Wrecking Ball

Urborg Volcano

Urborg Volcano enters tapped.
{T}: Add {B} or {R}.

Terror

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

Smoldering Tar

At the beginning of your upkeep, target player loses 1 life.
Sacrifice Smoldering Tar: It deals 4 damage to target creature. Activate only as a sorcery.