Stronghold Assassin

{T}, Sacrifice a creature: Destroy target nonblack creature.

Stronghold Taskmaster

Torment

Enchant creature
Enchanted creature gets -3/-0.

Tortured Existence

{B}, Discard a creature card: Return target creature card from your graveyard to your hand.

Wall of Souls

Defender (This creature can't attack.)
Whenever this creature is dealt combat damage, it deals that much damage to target opponent or planeswalker.

Amok

{1}, Discard a card at random: Put a +1/+1 counter on target creature.

Convulsing Licid

{R}, {T}: This creature loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay {R} to end this effect.
Enchanted creature can't block.

Craven Giant

Duct Crawler

{1}{R}: Target creature can't block this creature this turn.

Lancers en-Kor

Trample
{0}: The next 1 damage that would be dealt to this creature this turn is dealt to target creature you control instead.

Fanning the Flames

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Fanning the Flames deals X damage to any target.

Flame Wave

Flame Wave deals 4 damage to target player or planeswalker and each creature that player or that planeswalker's controller controls.

Fling

As an additional cost to cast this spell, sacrifice a creature.
Fling deals damage equal to the sacrificed creature's power to any target.

Flowstone Blade

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

Flowstone Hellion

Haste
{0}: This creature gets +1/-1 until end of turn.

Flowstone Mauler

Trample
{R}: This creature gets +1/-1 until end of turn.