When Ruination Rioter dies, you may have it deal damage to any target equal to the number of land cards in your graveyard.

Sacred Fire deals 2 damage to any target and you gain 2 life.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

: Prevent the next 1 damage that would be dealt to any target this turn.

: Prevent the next 2 damage that would be dealt to any target this turn.

Lifelink

Blood Chalice — Whenever another creature you control dies, Sanguinary Priest deals 1 damage to any target.

Sarkhan's Dragonfire deals 3 damage to any target.

Look at the top five cards of your library. You may reveal a red card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Whenever you cast a creature spell with power 4, 5, or 6, Sarkhan's Unsealing deals 4 damage to any target.

Whenever you cast a creature spell with power 7 or greater, Sarkhan's Unsealing deals 4 damage to each opponent and each creature and planeswalker they control.

Sauté deals 3½ damage to any target.

You may exile a white card from your hand rather than pay this spell's mana cost.

Prevent the next 7 damage that would be dealt to any target this turn. If it's a creature, put a +0/+1 counter on it for each 1 damage prevented this way at the beginning of the next end step.

Kicker (You may pay an additional as you cast this spell.)

Scorching Lava deals 2 damage to any target. If this spell was kicked, that creature can't be regenerated this turn and if it would die this turn, exile it instead.

Flying

Whenever Scourge of Valkas or another Dragon enters the battlefield under your control, it deals X damage to any target, where X is the number of Dragons you control.

: Scourge of Valkas gets +1/+0 until end of turn.

Sacrifice Seal of Fire: It deals 2 damage to any target.

Whenever you gain life, you may pay . If you do, Searing Meditation deals 2 damage to any target.

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)

Searing Touch deals 1 damage to any target.

Discard a land card: Seismic Assault deals 2 damage to any target.

Whenever an instant or sorcery spell is cast during your turn, Sentinel Tower deals damage to any target equal to 1 plus the number of instant and sorcery spells cast before that spell this turn.

: Prevent the next 1 damage that would be dealt to any target this turn.

, : Target creature gains vigilance until end of turn.

Deathtouch

Whenever Servant of the Stinger deals combat damage to a player, if you've committed a crime this turn, you may sacrifice Servant of the Stinger. If you do, search your library for a card, put it into your hand, then shuffle. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.)

, : Put target creature you control on top of its owner's library.

, : Shadow Guildmage deals 1 damage to any target and 1 damage to you.

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

Shard Volley deals 3 damage to any target.

Prevent the next 3 damage that would be dealt to any target this turn.

You may exile a white card with mana value X from your hand rather than pay this spell's mana cost.

The next X damage that a source of your choice would deal to you and/or creatures you control this turn is dealt to any target instead.

Shock deals 2 damage to any target.

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

Shrapnel Blast deals 5 damage to any target.

When Siege-Gang Commander enters the battlefield, create three 1/1 red Goblin creature tokens.

, Sacrifice a Goblin: Siege-Gang Commander deals 2 damage to any target.

Bloodthirst 3 (If an opponent was dealt damage this turn, this creature enters the battlefield with three +1/+1 counters on it.)

, Sacrifice Skarrgan Skybreaker: It deals damage equal to its power to any target.

Spectacle (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.)

Skewer the Critics deals 3 damage to any target.

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

When Skirk Marauder is turned face up, it deals 2 damage to any target.

When Skoa, Embermage enters the battlefield, it deals 4 damage to any target.

Grandeur — Discard another card named Skoa, Embermage, Sacrifice two Mountains: Skoa deals 4 damage to any target.

Flying

Whenever Skysovereign, Consul Flagship enters the battlefield or attacks, it deals 3 damage to target creature or planeswalker an opponent controls.

Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)

Slaying Fire deals 3 damage to any target.

Adamant — If at least three red mana was spent to cast this spell, it deals 4 damage instead.

Slivers you control have flying and "Whenever you draw a card, this creature deals 1 damage to any target" and ": Draw a card."

Whenever Sly Spy deals combat damage to a player, you may destroy target creature facing left in its art. (Creatures without faces don't face anywhere.)

Smiting Helix deals 3 damage to any target and you gain 3 life.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Defender

Sokrates, Athenian Teacher has hexproof as long as it's untapped.

Sokratic Dialogue — : Until end of turn, target creature gains "If this creature would deal combat damage to a player, prevent that damage. This creature's controller and that player each draw half that many cards, rounded down."

As an additional cost to cast this spell, discard a card at random.

Sonic Burst deals 4 damage to any target.

Bird creatures get +1/+1.

: Target Bird creature gains banding until end of turn. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding a player controls are blocking or being blocked by a creature, that player divides that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

+1: Look at the top card of your library. You may reveal that card and put it into your hand. If you do, you lose life equal to its mana value.

−2: Create a 2/3 black Vampire creature token with flying and lifelink.

−7: Sorin the Mirthless deals 13 damage to any target. You gain 13 life.

Extort (Whenever you cast a spell, you may pay . If you do, each opponent loses 1 life and you gain that much life.)

+2: Create a Food token.

−1: Sorin, Ravenous Neonate deals damage equal to the amount of life you gained this turn to any target.

−6: Gain control of target creature. It becomes a Vampire in addition to its other types. Put a lifelink counter on it if you control a white permanent other than that creature or Sorin.

Spend only black and/or red mana on X.

Soul Burn deals X damage to any target. You gain life equal to the damage dealt, but not more than the amount of spent on X, the player's life total before the damage was dealt, the planeswalker's loyalty before the damage was dealt, or the creature's toughness.

As an additional cost to cast this spell, sacrifice all creatures you control.

Soulblast deals damage to any target equal to the total power of the sacrificed creatures.

Target creature you control deals damage equal to its power to any target.

Spark Jolt deals 1 damage to any target. Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

When Sparkmage Apprentice enters the battlefield, it deals 1 damage to any target.

Flying

When Sparktongue Dragon enters the battlefield, you may pay . When you do, it deals 3 damage to any target.

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.

Whenever you cast an instant or sorcery spell, you may put a charge counter on Sphinx-Bone Wand. If you do, Sphinx-Bone Wand deals damage equal to the number of charge counters on it to any target.

: Spikeshot Elder deals damage equal to its power to any target.

Spiraling Embers deals damage to any target equal to the number of cards in your hand.

Whenever Spitemare is dealt damage, it deals that much damage to any target.