You may look at the top card of your library any time. You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost. {T}, Sacrifice ten nonland permanents: Each opponent loses 10 life.

When Abyssal Gatekeeper dies, each player sacrifices a creature.

Whenever Blood Artist or another creature dies, target player loses 1 life and you gain 1 life.

Sacrifice Blood Pet: Add {B}.

Flying When Cadaver Imp enters the battlefield, you may return target creature card from your graveyard to your hand.

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.) Whenever you tap a Swamp for mana, add an additional {B}.

Whenever another creature dies, you may gain 1 life.

{1}{B}, Sacrifice an artifact or creature: Draw a card.

When Elderfang Disciple enters the battlefield, each opponent discards a card.

Flying Whenever Falkenrath Noble or another creature dies, target player loses 1 life and you gain 1 life.

Sacrifice Fume Spitter: Put a -1/-1 counter on target creature.

Whenever one or more other creatures die, draw a card. This ability triggers only once each turn.

When Novice Occultist dies, you draw a card and you lose 1 life.

Whenever Pawn of Ulamog or another nontoken creature you control dies, you may create a 0/1 colorless Eldrazi Spawn creature token. It has "Sacrifice this creature: Add {C}."

Whenever another creature you control dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

{T}, Sacrifice two other creatures: Any number of target players each lose 2 life and sacrifice a creature. You add {B}{B} and draw a card.

When Serrated Scorpion dies, it deals 2 damage to each opponent and you gain 2 life.

When Skullport Merchant enters the battlefield, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") {1}{B}, Sacrifice another creature or a Treasure: Draw a card.

Whenever another creature you control dies, Vindictive Vampire deals 1 damage to each opponent and you gain 1 life.

When Bastion of Remembrance enters the battlefield, create a 1/1 white Human Soldier creature token. Whenever a creature you control dies, each opponent loses 1 life and you gain 1 life.

Whenever a creature dies, put a charge counter on Black Market. At the beginning of your precombat main phase, add {B} for each charge counter on Black Market.

Spectacle {B} (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.) Draw a card for each creature that died under your control this turn.

Add {B}{B}{B}. Threshold — Add {B}{B}{B}{B}{B} instead if seven or more cards are in your graveyard.

Add {B}{B}{B}.

As an additional cost to cast this spell, you may sacrifice one or more creatures. When you do, copy this spell for each creature sacrificed this way. You draw a card and you lose 1 life.

As an additional cost to cast this spell, sacrifice a creature. Search your library for a card, put that card into your hand, then shuffle.