As an additional cost to cast this spell, you may sacrifice any number of nonland permanents. This spell costs less to cast for each permanent sacrificed this way.

Whenever Rottenmouth Viper enters or attacks, put a blight counter on it. Then for each blight counter on it, each opponent loses 4 life unless that player sacrifices a nonland permanent of their choice or discards a card.

Bargain (You may sacrifice an artifact, enchantment, or token as you cast this spell.)

If this spell was bargained, look at the top four cards of your library, then put up to two of them back on top of your library in any order and the rest into your graveyard.

You draw two cards and you lose 2 life.

Sacrifice a creature. Rupture deals damage equal to that creature's power to each creature without flying and each player.

Flying

At the beginning of your upkeep, sacrifice an artifact other than Rust Elemental. If you can't, tap Rust Elemental and you lose 4 life.

Sacrifice an artifact: Regenerate Rusted Slasher.

As an additional cost to cast this spell, discard a card and sacrifice a creature.

Two target creatures each get -13/-13 until end of turn.

Sacrifice a creature: Target player discards two cards. Activate only as a sorcery.

When Sanguine Brushstroke enters the battlefield, create a Blood token and conjure a card named Blood Artist onto the battlefield.

Whenever you sacrifice a Blood token, each opponent loses 1 life and you gain 1 life.

When Sanguine Statuette enters, create a Blood token. (It's an artifact with ", , Discard a card, Sacrifice this artifact: Draw a card.")

Whenever you sacrifice a Blood token, you may have Sanguine Statuette become a 3/3 Vampire artifact creature with haste until end of turn.

Ward—Sacrifice a legendary artifact or legendary creature.

Whenever an opponent casts a spell, amass Orcs 1.

Whenever an Army you control deals combat damage to a player, the Ring tempts you.

Whenever the Ring tempts you, you may discard your hand. If you do, draw four cards.

At the beginning of your upkeep, put a spore counter on Savage Thallid.

Remove three spore counters from Savage Thallid: Create a 1/1 green Saproling creature token.

Sacrifice a Saproling: Regenerate target Fungus.

Equipped creature gets +2/+0.

Whenever equipped creature attacks, you may sacrifice a permanent other than that creature or Saw. If you do, draw a card.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

As an additional cost to cast this spell, sacrifice a creature.

Return any number of target creatures you control to their owner's hand.

Sacrifice a creature: Put a +1/+1 counter on Scarland Thrinax.

, Sacrifice an artifact with mana value X: Return target artifact card with mana value less than X from your graveyard to the battlefield. It gains haste until end of turn.

, Sacrifice another artifact: Scrapyard Steelbreaker gets +2/+1 until end of turn.

Shroud (This creature can't be the target of spells or abilities.)

When Scythe Tiger enters, sacrifice it unless you sacrifice a land.

Artifacts you control are Clues in addition to their other types and have ", Sacrifice this artifact: Draw a card."

Whenever you sacrifice a Clue, target creature can't be blocked this turn.

Flying

Whenever Seraph of New Phyrexia attacks, you may sacrifice another creature or artifact. If you do, Seraph of New Phyrexia gets +2/+1 until end of turn.

When Servant of Volrath leaves the battlefield, sacrifice a creature.

Flying

When Shadowborn Demon enters, destroy target non-Demon creature.

At the beginning of your upkeep, if there are fewer than six creature cards in your graveyard, sacrifice a creature.

Casualty 1 (As you cast this spell, you may sacrifice a creature with power 1 or greater. When you do, copy this spell and you may choose a new target for the copy.)

Target creature an opponent controls perpetually gets -0/-3.

Flying

Sacrifice another creature: Create a Blood token. If you sacrificed an Angel this way, create a number of Blood tokens equal to its toughness instead.

, Sacrifice six Blood tokens: Return each creature card from your graveyard to the battlefield with a finality counter on it. Those creatures are Vampires in addition to their other types.

Vigilance

When Shire Shirriff enters, you may sacrifice a token. When you do, exile target creature an opponent controls until Shire Shirriff leaves the battlefield.

Trample

When Shivan Wumpus enters, any player may sacrifice a land of their choice. If a player does, put Shivan Wumpus on top of its owner's library.

As an additional cost to cast this spell, sacrifice an artifact.

Shrapnel Blast deals 5 damage to any target.

Deathtouch

Exploit (When this creature enters, you may sacrifice a creature.)

When Sidisi, Undead Vizier exploits a creature, you may search your library for a card, put it into your hand, then shuffle.

Lieutenant — At the beginning of combat on your turn, if you control your commander, create two 1/1 red Goblin creature tokens. Those tokens gain haste until end of turn.

, Sacrifice a Goblin: Siege-Gang Lieutenant deals 1 damage to any target.

Exploit (When this creature enters, you may sacrifice a creature.)

When Silumgar Butcher exploits a creature, target creature gets -3/-3 until end of turn.

Flash (You may cast this spell any time you could cast an instant.)

Flying

Exploit (When this creature enters, you may sacrifice a creature.)

When Silumgar Sorcerer exploits a creature, counter target creature spell.

, Sacrifice another creature or an artifact: For each opponent, you mill a card, then return that card from your graveyard to your hand unless that player pays 3 life. (To mill a card, put the top card of your library into your graveyard.)

Choose a Background (You can have a Background as a second commander.)

, , Sacrifice a creature: Skull Catapult deals 2 damage to any target.

Devour 1 (As this enters, you may sacrifice any number of creatures. This creature enters with that many +1/+1 counters on it.)

When Skullmulcher enters, draw a card for each creature it devoured.

Reach

When Skyfisher Spider enters, you may sacrifice another creature. When you do, destroy target nonland permanent.

When Skyfisher Spider dies, you may gain 1 life for each creature card in your graveyard. If you do, exile Skyfisher Spider from your graveyard.

Whenever you sacrifice a permanent, Slaughter-Priest of Mogis gets +2/+0 until end of turn.

, Sacrifice another creature or an enchantment: Slaughter-Priest of Mogis gains first strike until end of turn.

Sacrifice an artifact: Target artifact gains indestructible until end of turn.

, , Sacrifice another artifact: Reveal the top eight cards of your library. Put up to two noncreature artifact cards with total mana value less than or equal to the sacrificed artifact's mana value from among them onto the battlefield and the rest on the bottom of your library in a random order.

At the beginning of combat on your turn, you may pay and sacrifice an artifact. If you do, create a 3/1 red Construct artifact creature token with haste.

When Sophia, Dogged Detective enters, create Tiny, a legendary 2/2 green Dog Detective creature token with trample.

, Sacrifice an artifact token: Put a +1/+1 counter on each Dog you control.

Whenever a Dog you control deals combat damage to a player, create a Food token, then investigate.

+1: Target creature you control gains deathtouch and lifelink until end of turn. If it's a Vampire, put a +1/+1 counter on it.

+1: You may sacrifice a Vampire. When you do, Sorin, Imperious Bloodlord deals 3 damage to any target and you gain 3 life.

−3: You may put a Vampire creature card from your hand onto the battlefield.

As an additional cost to cast this spell, discard a card or sacrifice a permanent.

Fathomless descent — Souls of the Lost's power is equal to the number of permanent cards in your graveyard and its toughness is equal to that number plus 1.

Devoid (This card has no color.)

When you cast this spell, create three 0/1 colorless Eldrazi Spawn creature tokens with "Sacrifice this creature: Add ."

, Sacrifice an Eldrazi: Spawn-Gang Commander deals 2 damage to any target.

When Spelldrain Assassin enters the battlefield, choose an instant or sorcery card in your hand. It perpetually gains casualty 2. (As you cast this spell, you may sacrifice a creature with power 2 or greater. When you do, copy this spell and you may choose a new target for the copy.)

At the beginning of your end step, choose target permanent card in your graveyard. You may sacrifice a permanent that shares a card type with the chosen card. If you do, return the chosen card from your graveyard to the battlefield and it gains "If this permanent would leave the battlefield, exile it instead of putting it anywhere else."

As an additional cost to cast this spell, sacrifice a creature.

Spontaneous Combustion deals 3 damage to each creature.

Sacrifice a land: Add one mana of any type the sacrificed land could produce.

Whenever Stangg, Echo Warrior attacks, create Stangg Twin, a legendary 3/4 red and green Human Warrior creature token. It enters tapped and attacking. For each Aura and Equipment attached to Stangg, create a token that's a copy of it attached to Stangg Twin. Sacrifice all tokens created this way at the beginning of the next end step.

Create two 1/1 white Warrior creature tokens with vigilance.

When Stimulus Package enters, create two Treasure tokens. (They're artifacts with ", Sacrifice this artifact: Add one mana of any color.")

Sacrifice a Treasure: Create a 1/1 green and white Citizen creature token.

Bargain (You may sacrifice an artifact, enchantment, or token as you cast this spell.)

Stonesplitter Bolt deals X damage to target creature or planeswalker. If this spell was bargained, it deals twice X damage to that permanent instead.