Kicker {R} (You may pay an additional {R} as you cast this spell.) Menace When Balduvian Atrocity enters the battlefield, if it was kicked, return target creature card with mana value 3 or less from your graveyard to the battlefield. It gains haste. Sacrifice it at the beginning of the next end step.

Enlist (As this creature attacks, you may tap a nonattacking creature you control without summoning sickness. When you do, add its power to this creature's until end of turn.) When Balduvian Berserker dies, it deals damage equal to its power to any target.

Whenever you sacrifice another creature, put a +1/+1 counter on Body Dropper. {B}{R}, Sacrifice another creature: Body Dropper gains menace until end of turn. (It can't be blocked except by two or more creatures.)

When Carrier Thrall dies, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add {C}."

Enlist (As this creature attacks, you may tap a nonattacking creature you control without summoning sickness. When you do, add its power to this creature's until end of turn.) Trample

Cult Conscript enters the battlefield tapped. {1}{B}: Return Cult Conscript from your graveyard to the battlefield. Activate only if a non-Skeleton creature died under your control this turn.

Haste When Daybreak Combatants enters the battlefield, target creature gets +2/+0 until end of turn.

Trample, haste Alliance — Whenever another creature enters the battlefield under your control, double Devilish Valet's power until end of turn.

{1}{R}: Dragonborn Immolator gets +1/+0 until end of turn. Gift of Tiamat — When Dragonborn Immolator dies, note its power. You get a boon with "When you cast your next creature spell, it perpetually gets +X/+0, where X is the noted number."

Backup 1 (When this creature enters the battlefield, put a +1/+1 counter on target creature. If that's another creature, it gains the following ability until end of turn.) Double strike

Menace (This creature can't be blocked except by two or more creatures.) {R}: Flowstone Kavu gets +1/-1 until end of turn.

{1}{R}: Furnace Gremlin gets +1/+0 until end of turn. When Furnace Gremlin dies, incubate X, where X is its power. (Create an Incubator token with X +1/+1 counters on it and "{2}: Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

Whenever you sacrifice another permanent, put a +1/+1 counter on Gixian Infiltrator.

When Gixian Recycler dies or is put into your graveyard from your hand or library, conjure a card named Gixian Recycler into your graveyard. Unearth {1}{B}

Backup 1 (When this creature enters the battlefield, put a +1/+1 counter on target creature. If that's another creature, it gains the following ability until end of turn.) Whenever this creature becomes tapped, you may discard a card. If you do, draw a card.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) {R}, Sacrifice Heartfire Immolator: It deals damage equal to its power to target creature or planeswalker.

Lifelink {B}, Exile Ichor Drinker from your graveyard: Incubate 2. Activate only as a sorcery. (Create an Incubator token with two +1/+1 counters on it and "{2}: Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

At the beginning of combat on your turn, create a 2/1 red Elemental creature token with trample and haste. Sacrifice it at the beginning of the next end step. {T}: Search your library for a card, put it into your hand, then shuffle. Activate only if five or more creatures died this turn.

Haste Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

When Pitchburn Devils dies, it deals 3 damage to any target.

When Riveteers Requisitioner dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") Blitz {2}{R} (If you cast this spell for its blitz cost, it gains haste and "When this creature dies, draw a card." Sacrifice it at the beginning of the next end step.)

When Tibalt's Rager dies, it deals 1 damage to any target. {1}{R}: Tibalt's Rager gets +2/+0 until end of turn.

Lightning Strike deals 3 damage to any target.

This spell costs {1} less to cast for each creature card in your graveyard. Exile target creature or planeswalker.

({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.

Bloodfell Caves enters the battlefield tapped. When Bloodfell Caves enters the battlefield, you gain 1 life. {T}: Add {B} or {R}.

Dragonskull Summit enters the battlefield tapped unless you control a Swamp or a Mountain. {T}: Add {B} or {R}.

Haunted Ridge enters the battlefield tapped unless you control two or more other lands. {T}: Add {B} or {R}.

({T}: Add {R}.)