
Desecration Demon | Creature | Demon | Flying
At the beginning of each combat, any opponent may sacrifice a creature. If a player does, tap Desecration Demon and put a +1/+1 counter on it. | Jason Chan

Grave Betrayal | Enchantment | | Whenever a creature you don't control dies, return it to the battlefield under your control with an additional +1/+1 counter on it at the beginning of the next end step. That creature is a black Zombie in addition to its other colors and types. | Lucas Graciano

Pack Rat | Creature | Rat | Pack Rat's power and toughness are each equal to the number of Rats you control.
{2}{B}, Discard a card: Create a token that's a copy of Pack Rat. | Kev Walker

Underworld Connections | Enchantment | Aura | Enchant land
Enchanted land has "{T}, Pay 1 life: Draw a card." | Yeong-Hao Han

Carnival Hellsteed | Creature | Nightmare Horse | First strike, haste
Unleash (You may have this creature enter the battlefield with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.) | Chase Stone

Dreadbore | Sorcery | | Destroy target creature or planeswalker. | Wayne Reynolds

Havoc Festival | Enchantment | | Players can't gain life.
At the beginning of each player's upkeep, that player loses half their life, rounded up. | Johannes Voss

Slaughter Games | Sorcery | | This spell can't be countered.
Choose a nonland card name. Search target opponent's graveyard, hand, and library for any number of cards with that name and exile them. Then that player shuffles. | Steve Prescott

Cryptborn Horror | Creature | Horror | Trample
Cryptborn Horror enters the battlefield with X +1/+1 counters on it, where X is the total life lost by your opponents this turn. | Richard Wright

Abrupt Decay | Instant | | This spell can't be countered.
Destroy target nonland permanent with mana value 3 or less. | Svetlin Velinov

Corpsejack Menace | Creature | Fungus | If one or more +1/+1 counters would be put on a creature you control, twice that many +1/+1 counters are put on it instead. | Chris Rahn

Jarad's Orders | Sorcery | | Search your library for up to two creature cards and reveal them. Put one into your hand and the other into your graveyard. Then shuffle. | Svetlin Velinov

Lotleth Troll | Creature | Zombie Troll | Trample
Discard a creature card: Put a +1/+1 counter on Lotleth Troll.
{B}: Regenerate Lotleth Troll. | Vincent Proce

Deathrite Shaman | Creature | Elf Shaman | {T}: Exile target land card from a graveyard. Add one mana of any color.
{B}, {T}: Exile target instant or sorcery card from a graveyard. Each opponent loses 2 life.
{G}, {T}: Exile target creature card from a graveyard. You gain 2 life. | Steve Argyle

Blood Crypt | Land | Swamp Mountain | ({T}: Add {B} or {R}.)
As Blood Crypt enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped. | Vincent Proce

Overgrown Tomb | Land | Swamp Forest | ({T}: Add {B} or {G}.)
As Overgrown Tomb enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped. | Steven Belledin