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 or discards a card.

Whenever Rotting Giant attacks or blocks, sacrifice it unless you exile a card from your graveyard.

Cumulative upkeep (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.)

Whenever a Swamp, Mountain, black permanent, or red permanent becomes tapped, Royal Decree deals 1 damage to that permanent's controller.

Whenever Ruinous Minotaur deals damage to an opponent, sacrifice a land.

At the beginning of your upkeep, you may put a verse counter on Rumbling Crescendo.

, Sacrifice Rumbling Crescendo: Destroy up to X target lands, where X is the number of verse counters on Rumbling Crescendo.

Target opponent sacrifices a creature with flying.

When Rune-Brand Juggler enters, suspect up to one target creature you control. (A suspected creature has menace and can't block.)

, Sacrifice a suspected creature: Target creature gets -5/-5 until end of turn.

, : Target attacking creature gets +2/+0 until end of turn. When that creature leaves the battlefield this turn, sacrifice Runesword. If the creature deals damage to a creature this turn, the creature dealt damage can't be regenerated this turn. If a creature dealt damage by the targeted creature would die this turn, exile that creature instead.

Rupture Spire enters tapped.

When Rupture Spire enters, sacrifice it unless you pay .

: Add one mana of any color.

Kicker—Sacrifice a land. (You may sacrifice a land in addition to any other costs as you cast this spell.)

Return target nonland permanent to its owner's hand. If this spell was kicked, return another target nonland permanent to its owner's hand.

First strike

Sacrifice an artifact: Rust Monster gets +2/+0 until end of turn.

Fading 5 <I>(This creature enters with five fade counters on it. At the beginning of your upkeep, remove a fade counter from it. If you can't, sacrifice it.)</I>

Rusting Golem's power and toughness are each equal to the number of fade counters on it.

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.

When Ruthless Lawbringer enters, you may sacrifice another creature. When you do, destroy target nonland permanent.

At the beginning of each player's upkeep, that player sacrifices a non-Elf creature.

At the beginning of your upkeep, sacrifice Sacred Mesa unless you sacrifice a Pegasus.

: Create a 1/1 white Pegasus creature token with flying.

A person outside the game chooses an attacking or blocking creature target opponent controls. That player sacrifices that creature.

, : Exile target creature you control.

At the beginning of your upkeep, you may sacrifice Safe Haven. If you do, return each card exiled with Safe Haven to the battlefield under its owner's control.

, Sacrifice an artifact: Draw a card.

Whenever you cast an artifact spell, create a 1/1 colorless Thopter artifact creature token with flying.

, Sacrifice two artifacts: Draw a card.

Sacrifice Sakura-Tribe Elder: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

, Sacrifice Salvage Scout: Return target artifact card from your graveyard to your hand.

Sacrifice Salvager of Ruin: Choose target permanent card in your graveyard that was put there from the battlefield this turn. Return it to your hand.

, Sacrifice Samite Censer-Bearer: Prevent the next 1 damage that would be dealt to each creature you control this turn.

Sacrifice Sanctum Guardian: The next time a source of your choice would deal damage to any target this turn, prevent that damage.

, Sacrifice two lands and Sandstone Deadfall: Destroy target attacking creature.

, Sacrifice Sandstorm Eidolon: Target creature can't block this turn.

Whenever you cast a multicolored spell, you may return Sandstorm Eidolon from your graveyard to your hand.

, Sacrifice a creature: Destroy each creature with the same mana value as the sacrificed creature.

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.

Fading 7 (This enchantment enters with seven fade counters on it. At the beginning of your upkeep, remove a fade counter from it. If you can't, sacrifice it.)

Remove a fade counter from Saproling Burst: Create a green Saproling creature token. It has "This creature's power and toughness are each equal to the number of fade counters on Saproling Burst."

When Saproling Burst leaves the battlefield, destroy all tokens created with Saproling Burst. They can't be regenerated.

Exile two cards from your graveyard: Sarcatog gets +1/+1 until end of turn.

Sacrifice an artifact: Sarcatog gets +1/+1 until end of turn.

0: Reveal the top card of your library and put it into your hand. Sarkhan the Mad deals damage to himself equal to that card's mana value.

−2: Target creature's controller sacrifices it, then that player creates a 5/5 red Dragon creature token with flying.

−4: Each Dragon creature you control deals damage equal to its power to target player or planeswalker.

Menace, haste

Whenever Satya, Aetherflux Genius attacks, create a tapped and attacking token that's a copy of up to one other target nontoken creature you control. You get (two energy counters). At the beginning of the next end step, sacrifice that token unless you pay an amount of equal to its mana value.

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.

As an additional cost to cast this spell, sacrifice a creature with power 4 or greater.

Search your library for a Dinosaur creature card, put it onto the battlefield, then shuffle. It gains indestructible until your next turn.

Target creature gets -2/-2 until end of turn. Create a Food token. (It's an artifact with ", , Sacrifice this artifact: You gain 3 life.")

Whenever Savvy Hunter attacks or blocks, create a Food token. (It's an artifact with ", , Sacrifice this artifact: You gain 3 life.")

Sacrifice two Foods: Draw a card.

Menace

, Sacrifice another creature or enchantment: Put a +1/+1 counter on Sawblade Skinripper.

At the beginning of your end step, if you sacrificed one or more permanents this turn, Sawblade Skinripper deals that much damage to any target.

, Pay 1 life, Sacrifice Scalding Tarn: Search your library for an Island or Mountain card, put it onto the battlefield, then shuffle.

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 Scarab of the Unseen: Return all Auras attached to target permanent you own to their owners' hands. Draw a card at the beginning of the next turn's upkeep.

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

: Add .

, , Sacrifice a Desert: Exile all graveyards.

Visit — Choose "an elf or goblin," "a tail," or "a flying creature or flying vehicle" at random. You have ten seconds to search your library and reveal a card with the chosen item in its art. If you do, claim the prize Then shuffle.

Prize — You get , then you may put a sticker on a nonland permanent you own. Sacrifice Scavenger Hunt and open an Attraction.

Lights — 2, 4, 6

Visit — Choose "a weapon," "five or more creatures," or "words or numbers" at random. You have ten seconds to search your library and reveal a card with the chosen item in its art. If you do, claim the prize Then shuffle.

Prize — You get , then you may put a sticker on a nonland permanent you own. Sacrifice Scavenger Hunt and open an Attraction.

Lights — 3, 4, 6

Visit — Choose "a four-legged creature," "a liquid other than water," or "a door" at random. You have ten seconds to search your library and reveal a card with the chosen item in its art. If you do, claim the prize Then shuffle.

Prize — You get , then you may put a sticker on a nonland permanent you own. Sacrifice Scavenger Hunt and open an Attraction.

Lights — 4, 5, 6

Scene of the Crime enters tapped.

: Add .

, Tap an untapped creature you control: Add one mana of any color.

, Sacrifice Scene of the Crime: Draw a card.

Whenever Scion of Opulence or another nontoken Vampire you control dies, create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

, Sacrifice two artifacts: Exile the top card of your library. You may play that card this turn.

If Scorched Ruins would enter, sacrifice two untapped lands instead. If you do, put Scorched Ruins onto the battlefield. If you don't, put it into its owner's graveyard.

: Add .

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

, Sacrifice this creature: Draw a card.