Lurking Jackals

When an opponent has 10 or less life, if Lurking Jackals is an enchantment, it becomes a 3/2 Jackal creature.

Swamp

Flame Rift

Flame Rift deals 4 damage to each player.

Lava Tubes

Lava Tubes doesn't untap during your untap step if it has a depletion counter on it.
At the beginning of your upkeep, remove a depletion counter from Lava Tubes.
{T}: Add {B} or {R}. Put a depletion counter on Lava Tubes.

Vicious Hunger

Vicious Hunger deals 2 damage to target creature and you gain 2 life.

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.

Phyrexian War Beast

When Phyrexian War Beast leaves the battlefield, sacrifice a land and Phyrexian War Beast deals 1 damage to you.

Flesh Reaver

Whenever Flesh Reaver deals damage to a creature or opponent, Flesh Reaver deals that much damage to you.

Rathi Dragon

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Rathi Dragon enters the battlefield, sacrifice it unless you sacrifice two Mountains.

Morinfen

Flying
Cumulative upkeep—Pay 1 life. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

Kezzerdrix

First strike
At the beginning of your upkeep, if your opponents control no creatures, Kezzerdrix deals 4 damage to you.

Fumarole

As an additional cost to cast this spell, pay 3 life.
Destroy target creature and target land.

Gallowbraid

Trample
Cumulative upkeep—Pay 1 life. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

Cinder Marsh

{T}: Add {C}.
{T}: Add {B} or {R}. Cinder Marsh doesn't untap during your next untap step.

Agent of Stromgald

Blasted Landscape

{T}: Add {C}.
Cycling {2} ({2}, Discard this card: Draw a card.)

Commander Greven il-Vec

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
When Commander Greven il-Vec enters the battlefield, sacrifice a creature.

Last-Ditch Effort

Sacrifice any number of creatures. Last-Ditch Effort deals that much damage to any target.

Rhystic Syphon

Unless target player pays {3}, that player loses 5 life and you gain 5 life.

Carnophage

At the beginning of your upkeep, tap Carnophage unless you pay 1 life.

Serpent Warrior

When Serpent Warrior enters the battlefield, you lose 3 life.

Lim-Dûl's Paladin

Trample
At the beginning of your upkeep, you may discard a card. If you don't, sacrifice Lim-Dûl's Paladin and draw a card.
Whenever Lim-Dûl's Paladin becomes blocked, it gets +6/+3 until end of turn.
Whenever Lim-Dûl's Paladin attacks and isn't blocked, it assigns no combat damage this turn and defending player loses 4 life.

Phyrexian Purge

This spell costs 3 life more to cast for each target.
Destroy any number of target creatures.

Rocky Tar Pit

Rocky Tar Pit enters the battlefield tapped.
{T}, Sacrifice Rocky Tar Pit: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.

Skulking Ghost

Flying
When Skulking Ghost becomes the target of a spell or ability, sacrifice it.

Shock

Mountain

Junún Efreet

Flying
At the beginning of your upkeep, sacrifice Junún Efreet unless you pay {B}{B}.

Tethered Skirge

Flying
Whenever Tethered Skirge becomes the target of a spell or ability, you lose 1 life.

Foul Imp

Flying
When Foul Imp enters the battlefield, you lose 2 life.

Lurking Evil

Pay half your life, rounded up: Lurking Evil becomes a 4/4 Phyrexian Horror creature with flying.

Spinal Graft

Enchant creature
Enchanted creature gets +3/+3.
When enchanted creature becomes the target of a spell or ability, destroy that creature. It can't be regenerated.