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

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Scavenge (, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)

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.)

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

Whenever Sly Spy deals combat damage to a player, roll a six-sided die. That player loses life equal to the result.

Destroy target artifact. Smash to Smithereens deals 3 damage to that artifact's controller.

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.)

Wither (This deals damage to creatures in the form of -1/-1 counters.)

At the beginning of your upkeep, target player loses 1 life.

Sacrifice Smoldering Tar: It deals 4 damage to target creature. Activate only as a sorcery.

Hideaway 4 (When this artifact enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.)

Whenever Smuggler's Buggy deals combat damage to a player, you may cast the exiled card without paying its mana cost. If you do, return Smuggler's Buggy to its owner's hand.

Crew 2

Enchant creature

Enchanted creature has poisonous 3. (Whenever it deals combat damage to a player, that player gets three poison counters. A player with ten or more poison counters loses the game.)

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Double strike

Whenever this creature mutates, it deals 4 damage to target creature or planeswalker an opponent controls and you gain 4 life.

Whenever Snapping Thragg deals combat damage to a player, you may have it deal 3 damage to target creature that player controls.

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

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."

Each creature deals damage to itself equal to its power.

, Sacrifice Soldier Replica: It deals 3 damage to target attacking or blocking creature.

At the beginning of your upkeep, sacrifice Solitary Confinement unless you discard a card.

Skip your draw step.

You have shroud. (You can't be the target of spells or abilities.)

Prevent all damage that would be dealt to you.

If a source you control would deal noncombat damage to an opponent or a permanent an opponent controls, it deals double that damage to that player or permanent instead.

, Discard two cards: Put an indestructible counter on Solphim, Mayhem Dominus. ( can be paid with either or 2 life.)

Shadow (This creature can block or be blocked by only creatures with shadow.)

Whenever Soltari Visionary deals damage to a player, destroy target enchantment that player controls.

When Somberwald Beastmaster enters, create a 2/2 green Wolf creature token, a 3/3 green Beast creature token, and a 4/4 green Beast creature token.

Creature tokens you control have deathtouch. (Any amount of damage they deal to a creature is enough to destroy it.)

Flying

Whenever Somnophore deals damage to a player, tap target creature that player controls. That creature doesn't untap during its controller's untap step for as long as Somnophore remains on the battlefield.

: Prevent all combat damage that would be dealt this turn by target attacking creature with flying.

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

Sonic Burst deals 4 damage to any target.

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.

(Gain the next level as a sorcery to add its ability.)

When Sorcerer Class enters, draw two cards, then discard two cards.

: Level 2

//Level_2//

Creatures you control have ": Add or . Spend this mana only to cast an instant or sorcery spell or to gain a Class level."

: Level 3

//Level_3//

Whenever you cast an instant or sorcery spell, that spell deals damage to each opponent equal to the number of instant and sorcery spells you've cast this turn.

Equipped creature has ": This creature deals 1 damage to target player or planeswalker. If this creature is a Wizard, it deals 2 damage instead."

Equip

+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.

+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.

+1: Up to one target creature gets +2/+0 until end of turn.

−2: Sorin, Vampire Lord deals 4 damage to any target. You gain 4 life.

−8: Until end of turn, each Vampire you control gains ": Gain control of target creature."

Sorin's Thirst deals 2 damage to target creature and you gain 2 life.

: Choose two target blocking creatures controlled by the same opponent. If each of those creatures could block all creatures that the other is blocking, remove both of them from combat. Each one then blocks all creatures the other was blocking.

Whenever Sorrow's Path becomes tapped, it deals 2 damage to you and each creature you control.

Other Snake creatures you control get +1/+0.

Whenever a Warrior you control deals combat damage to a creature, destroy that creature at end of combat.

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.

Flying

Whenever a creature dealt damage by Soul Collector this turn dies, return that card to the battlefield under your control.

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

Enchant creature

Whenever enchanted creature deals damage, you gain that much life.

Whenever enchanted creature is dealt damage, you gain that much life.

First strike

: Soul of Shandalar deals 3 damage to target player or planeswalker and 3 damage to up to one target creature that player or that planeswalker's controller controls.

, Exile Soul of Shandalar from your graveyard: Soul of Shandalar deals 3 damage to target player or planeswalker and 3 damage to up to one target creature that player or that planeswalker's controller controls.

Soul Sear deals 5 damage to target creature or planeswalker. That permanent loses indestructible until end of turn.

Soul Shred deals 3 damage to target nonblack creature. You gain 3 life.

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.

Soulhunter Rakshasa can't block.

When Soulhunter Rakshasa enters, if you cast it from your hand, it deals 1 damage to target opponent for each Swamp you control.

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

Prowess

If a source you control would deal noncombat damage to a creature an opponent controls, put that many -1/-1 counters on that creature instead.

More Than Meets the Eye (You may cast this card converted for .)

Whenever one or more creature tokens you control deal combat damage to a player, exile target instant or sorcery card with mana value equal to the damage dealt from their graveyard. Copy it. You may cast the copy without paying its mana cost. If you do, convert Soundwave.

Flying

As Sower of Discord enters, choose two players.

Whenever damage is dealt to one of the chosen players, the other chosen player also loses that much life.

Equipped creature gets +1/+0 and has "Whenever this creature attacks, you may sacrifice Spare Dagger. When you do, this creature deals 1 damage to any target."

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

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.)

Choose target creature. Exile the top card of your library. You may have Spark of Creativity deal damage to that creature equal to the exiled card's mana value. If you don't, you may play that card until end of turn.

When Sparkcaster enters, return a red or green creature you control to its owner's hand.

When Sparkcaster enters, it deals 1 damage to target player or planeswalker.

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

At the beginning of combat on your turn, choose any number of target planeswalkers you control. Until end of turn, they become 3/3 blue Bird creatures with flying, hexproof, and "Whenever this creature deals combat damage to a player, scry 1." (They're no longer planeswalkers. Loyalty abilities can still be activated.)